Another door-related practical joke, good in dorm-life scenarios:©JOKEDEMO.COM

Locate undesirable LP record w/ jacket. I recommend "Mystic Moods".
Fetch cardboard jacket-- should be in good condition, no split sides or the such. (Save disc for frisbee-- they shatter in fine fashion when hurled in a room. But I digress.)
Fetch can of shaving cream, e.g. Gillette Foamy or the like. Fill album cover with shaving cream.©JOKEDEMO.COM

With accomplice, go to room of victim. Their door should be closed.
Fit open edge of cream-filled album cover under bottom of door.
Accomplice braces album cover. ©JOKEDEMO.COM

Jump on album cover, ejecting shaving cream into dorm room.Run like hell. ©JOKEDEMO.COM

Note that if the intended victim's door fits the frame very tightly, leaving little or no room for the escape of the shaving cream, step number 7 will instead result in a shaving cream explosion in the faces of the would-be jokers. This suggests an obvious alternate "patsy" scenario...©JOKEDEMO.COM

This was funny when tried. Of course, most things are funny at 4 AM.