This one actually works...

Ok, so get a mask on, grab two condoms, lubricated, open them and add TONS of vaseline all over the outside and inside of them, then walk up to one of the classrooms, open the door, and from the inside of the class, place one of the condoms over the door handle, then shut the door fast and place the other on the door handle outside of the classroom.

When anyone tries to open the door, it will be to slippery, and imposible to open.

It works, trust me.

__________________