Silence battle

A battle of silence, if one forgets, they lose

P1 : Let's do a silence battle
P2 : ...
P1 : ...
P2 : ...
P1 : ...
P2 : ...
P1 : ...
P2 : ...
P1 : ...
P2 : ...
P1 : ...
*4 minutes later*
P1 : You forgot, i win