The first person "does" something
Then the next person does something responding to the first person.
Here's an example:
Person1: **Sits in a room**
Person2: **Throws paper ball at insert name here
Person3: **smacks insert name here for throwing that paper ball.
Person4: **Does a happy dance because I don't like person2!**
and so on!
I'll start:
**Eats cheese**