what are some funny high school locker room jokes?

[Advice Man]

i want to play a joke on some friends in the locker room... where nobody gets in trouble. i have no idea what to do. any suggestions?

 

[Sasha]

Okay hide someone in the locker than when someone is close by the person in the locker can hit them I'm in high school and once my friends did that on accident it was bad but funny so trust me you won't get in trouble,just be careful!!!!