There's an episode where he's trying to hide from his step-sisters at his school, and for some reason he's dragging a classmate around with him who was trying to go use the restroom. They eventually end up locked in the sports shed - you know the trope. He has her get on his shoulders to try to reach a window, and well, pee happens.
Oh, that doesn't sound bad at all compared to how it went down in Prison School. Highschool of the Dead did the shoulder version as well.