The object of the game is you have to answer the person's above's answer, but make it totally wacky!!
(e.g. Poster 1: Q: Why are pillows soft?
Poster 2: A: Because they're filled with clouds (well that one isn't funny)
Q: Then he/she asks a question..
Poster 3: A: he/she answers
Q: Why are diamonds so shiny?