At one point we were playing Yes!And! which is a simple agreement warm up where we pitch an Imaginary product and each person adds an attribute to it.
Our game was going something to the effect of:
Boy 1: Yes! And! It glows in the dark so you can see where you are.
Boy 2: Yes! And! It let's you talk to dinosaurs.
Boy 1: Yes! And! It has a dispenser so you can feed the dinosaurs.
Boy 2: Yes! And! What makes it glow in the dark gives you super powers!
Boy 1: Yes! And! One of the super powers is never sneezing again!
And we all died laughing.