Kita, the young lion cub, crouched in the long grass of the Savannah, his tail flicking playfully as he watched his prey grazing. Just yesterday his father had taught him how to hunt, and even though the older lion had told his son to hone his skills before trying on his own, the lion cub was brash, arrogant and anxious to try what he had learned. 
He licked his lips as he watched the herds of large, juicy animals grazing peacefully on the long grass. Packs of elephants, rhinoceros, hippopotamus and wildebeest of phenomenal size roamed all over this patch on plain, and Kita was getting hungry just watching the fat, juicy meat move about. Finally he could take it no more. Slowly he crept forwards, his sandy coloured fur blending in perfectly with the brown grass, noticing a large rhino that had wandered away from the rest of the herds. He licked his lips, then tensed his muscles to spring, bared his teeth, and leapt.
And collided with the thick skin of the rhino’s rump, his young teeth too small and blunt to pierce it at all. He yelped and bounced off, falling to the ground stunned and dazed. The rhino meanwhile noticed a light tickling feeling on her rump. She turned her head and looked back at the downed Kita, then lifted her tail and sat down heavily with a ‘squelch,’ her huge rump utterly covering the poor lion cub. She smirked and ground her butt back and forth to flatten him out, then went back to chewing the tasty grass, occasionally shifting her weight to better squash her captive. 
After half an hour and quite a lot of grass, the rhino stood up and turned around, picking up the flat cub in her mouth and carrying him over to the leader of the group, a colossal elephant, at least twice the size of the next largest one, who was lying down in the middle of the group. The rhino spat the cub out in front of her, and then bowed by bending her front legs. The huge elephant smirked as she looked down at the rhino and the 2D cub.
“Hey there, Rosetta,” The elephant, whose name was Tessa, greeted her “Another predator who doesn’t know his place? It’s been a long time since we’ve had one of those...”
Rosetta the rhino nodded. “Yep. He tried to jump me while I was away from the group. Looks like Kina’s son, Kita. What should we do with him, Tess?”
The elephant looked around at the group, then let out a loud trumpet. Instantly all the creatures around the group gathered around and created a large circle with Tessa at one end. Elephants, hippos, rhinos and wildebeest all formed the arena, standing shoulder-to-shoulder and grinning expectantly. They knew what was coming next. Tessa nodded to Rosetta, who took up position next to her.
“It’s been a while since the girls had some fun, and I think we should teach the cub a lesson about hunting. Never try it on us.” She grinned and nodded to a few girls.
In the middle of the circle, Kita shook his head and stood up as his body finished re-inflating itself, then looked around dizzily. The last thing he remembered was looking up into the backside of a huge rhino, and then darkness and intense pressure. He growled, still disoriented, then bit at the nearest thing nearby, sinking his teeth into it.
The giant hippo looked down at the cub trying to savage her, then smirked. 
“Awww... Isn’t that cute... He thinks he’s a predator...”
She laughed, then lifted her foot, causing Kita to fall off, before rising up on her back legs.
“Time for you to go from predator to pancake.” She grinned, then spread her front legs and fell forwards, dropping her entire bulk right on top of the downed Kita with a splat and a boom, raising a large dust cloud. The hippo chuckled, then allowed her bulk to settle before rolling her body from side to side a little, laughing at the splats and whimpers coming from beneath her, the rest of the pack laughing along with her. 
As comfortable as she was, the hippo decided to keep things moving for entertainment’s sake. She lifted her bulk up and dislodged the centimetre-think lion cub from underneath, then turned wriggled her butt before slamming it down on top of him and grinding it from side to side, moaning as she used him to scratch an itch on her rear.
After five minutes of this, accompanied by non-stop laughter from the herd, a grinning Tessa raised her front foot, signalling for the hippo to stop. Reluctantly the hippo stood up and shook the mashed-up Kita of her butt, his arms and legs flattened at weird angles due to the grinding he’d received. He groaned as his body started to repair itself.
Terra giggled when she saw how Kita had turned out, then nodded to two large rhinos in the circle, who stepped in and started to circle around the slowly-reinflating Kita, getting closer and closer until they were a metre away from him on either side and he was just getting to his feet. The rhino behind him then quickly snatched the scruff of his neck up in her mouth, and rolled onto her back, placing him on her belly.
The other rhino then took a run-up, leapt, and came crashing down on top of the first, sandwiching the tiny cub with a yelp and a very definite splat. The whole circle laughed hugely as the two rhinos started to roll back and forth, a constant stream of squeals, yelps and squishing noises coming from between the two as Kita was mashed constantly over and over. 
When the novelty had finally worn off, the two rhinos stood up off the mangled lion cub, leaving him flat as a piece of paper and screwed up in the middle of the arena. Tessa grinned again, then nodded two the two to leave. As they did so, the slightly larger of the two stomped on Kita a few times, giggling to herself.
Eventually the lion cub got to his feet again, dazed and confused, just as two of the larger elephants forming the circle stepped in, leaving large gaps in the crowd. They grinned at each other as one of them picked up Kita by his tail with her trunk. The lion cub whimpered.
“W-wait! I’m sorry! I didn’t mean it! P-please let me go! I won’t do it again!” The terrified cub kicked and clawed at the air, hanging upside-down in the elephant’s grip. The animal holding him laughed as the other one walked up to him.
“We know,” The other elephant said, grinning, “But we’ve got to make sure you fully understand your lesson. Besides, you’re too fun to let go!” She giggled, and the elephant holding the lion cub hoisted him over her shoulder with her trunk, then dangled him right in front of her butt, right in the middle of her left butt cheek.
Kita yelped as he thudded against her hard butt cheek, then shook his head to clear the dizziness and opened his eyes, gulping at what he saw. Although he was upside-down, he could clearly see what was coming. If front of him, the other elephant walked into view, then winked at him teasingly, then turned around with a huge grin on her face so that her butt was facing him. She raised her tail, then started to back up, her huge butt getting closer and closer until it was the only thing in his view, every line and wrinkle up close and personal.
“No! No! Don’t!! Pleeeass- ‘SQUISH!’
The two elephants laughed hugely along with the rest of the circle as the cub was sandwiched between the two massive rumps, smooshed and squished in between the two walls of fat and thick, leathery hide. The elephants continued to move towards each other until they couldn’t go any further, and their rumps were smooshed up against each other, the cub’s squeals and whimpers muffled to the point of incoherency by the walls of fat on either side.
The elephants, still laughing, then started to grind their immense rears together, a cacophony of squishes, squeals and splats coming from between them. The two beasts then stopped and backed up, revealing the splattered Kita pasted across the rear of the larger one, his body nearly a single millimeter thick, his arms and legs squished outwards in a cross-shape, his eyes bugging out, and his tongue flattened out of his mouth, pointing straight down. His tail was in the best shape, as it was what the elephant had been holding onto while the other one backed up. Still, it hadn’t escaped the harsh punishment either, as it had been smushed between the walls of fat that had been created when the elephants backed into each other. All around the circle the assembled horde of massive animals were laughing like crazy, a few of them rolling around in mirth, all of them with tears in their eyes.
Eventually when the circle had calmed down a bit, the elephants lined up their huge rears again. Kita’s eyes widened, but there was little he could do as the two elephants slammed together again, pulverising his body for a second time, grinding their rumps together even harder and pushing against each other with all their might. 
This time when they pulled away however, the young cub was not tattooed across one of the elephant’s cheeks. Instead, his entire body had become lodged in between the larger elephant’s cheeks, wedged right up in her butt crack, only a sliver of sandy fur showing between the two mountains of flab, and his tail poking out. The entire circle burst into a second round of laughter as the elephant, who had caught on to what was happening, paraded around the circle proudly, shaking her hips with each step and causing her cheeks to grind the lion cub flatter and flatter with each step, until he was no longer visible. At that point, Tessa got to her feet.
The laughter quickly died down as the colossal elephant loomed over the rest. The two elephants in the circle bowed respectfully, then left, the larger one making sure to dislodge Kita before she left, leaving him in the middle of the circle, mashed, squished, and flattened beyond belief.
“I think these girls have been more than capable teachers for you,” Tessa said “And I believe you have learned your lesson. I very much doubt that you will mess with the pack ever again.” Kita, whose body had reformed, dizzily got to his feet and nodded frantically, hope sparking in his eyes at her words. Tessa continued. “However, I feel that maybe I should cement the point home...”
At this the lion cub’s eyes widened in horror, and he shook his head desperately. “N-no! I’ve learned my lesson, I swear!! I’ll never bother you or your pack, or any large animals even again!!!” He squealed.
The giant elephant advanced towards him until she stood a mere meter away, looming over him like a monster truck. She grinned and looked around.
“Well then, why don’t we put this to a vote? That’s the fair way to do it. All in favour of letting Kita go free?” The lion nodded desperately and yipped, then looked around and noticed that none of the animals had moved at all, and all were grinning. Tessa continued
“And all in favour of me making Kita here my cushion for the day?”
Instantly the entire circle bellowed, roared, called and hollered, all of them voicing their support. Tessa grinned and looked down at the tiny little lion. “The crowd has spoken.” 
The huge elephant slowly started to turn around, revealing a rear as wide as the body of a plane. She looked back at Kita, who had started to run, then grinned and lifted her front feet into the air, before allowing herself to fall backwards, her enormous rear-end blocking out the sun and casting a shadow over the fleeing Kita. The gigantic  rear then crashed down hard directly on top of the lion, creating an ear-shattering boom on impact and sending dust flying for meters on either side of her. 
A huge cheer went up from the assemble animals as Tessa let out a loud trumpet of victory and ground her butt down on top of him, flattening the possibility of there being any 3D parts of him left. She then giggled and nodded to the assembled girls. 
“Ok, show’s over. Back to what you were doing.” She grinned as the assembled girls walked off, then got to her feet and walked away from the herd, the extraordinarily flattened Kita spread across one entire butt cheek. She then sat down again and watched her herd playing as the sun moved across the sky, occasionally bouncing or grinding her butt on top of her tiny captive.
“Y’know, I think we’ll get along juuuust fine...”