Try to hold it in.

From Create Your Own Story

Peeing right now would surely give your position away. You decide the best thing to do is try your best to hold it in. With your knees still pressed firmly together and one hand pressing tightly against your waterhole, you lifted up your legs and put them up on the toilet seat so no one can see your shoes from outside the stall.

Bam! The loud slamming open of the bathroom door startled you as you almost wet yourself. The deliberate stomps of the pursuing guard echos off the bathroom walls. You hold your breath and try to remain perfectly still as you listen to the closing footsteps.