Ratchet felt his belt getting snug. He felt strangely bloated, as if he’d just eaten a big meal. And that bloated feeling was growing. A deep gurgle emanated from inside him.
Looking down, he gasped at what was happening to him now. His stomach stuck out in front of him. His sides grew too, followed by his backside. His whole midsection was swelling. The sound of liquid sloshing around inside him could be heard. Feeling a bit off balance, he looks down behind him as his butt began to bulge. His cheeks doubled in size almost instantly.
His belt was feeling tighter, causing discomfort.

“Ow ow ow!” Ratchet cried, trying to reach his belt. “Belt…getting….tight….gotta get it off…”

POP! his belt snapped off by itself.