Monster Max and the Bobble Hat of Forgetting

This is Max. Everything normal here. Nothing weird about Max ... until he burps. When Max burps he becomes a huge monster, with teeth like swords, who can jump over buildings, roar and eat whole dustbins. It's great being a monster and saving people, his aim 'to protect and do good stuff', unless he sneezes when he didn't mean to, changes back, and finds himself far from home in just his pants. Bu...