A Mandatory - A game where you yell 'mandatory jello!' and collapse like a

A game where you yell 'mandatory jello!' and collapse like a pile of jello, and the other person has to catch you like you're a clumsy kid.

I yelled 'mandatory jello!' and fell like a pile of jello on my face.

My friend tried to catch me and got covered in jello.

We played mandatory jello and I had to eat jello for dinner.