You defend against the attack from the poster above you and then you attack the poster below you.
Example:
Poster #1 wrote:
Attack: *Throws rock at next poster*
Poster #2 wrote:Defend: *Holds up garbage can lid to deflect the rock*
Attack: *Throws banana flambe at next poster*
I'll start:
Attack: *Throws a flaming wad of paper at next poster*






