Practical Joke 1: After making sure that the victim is out or sound
asleep (if the victim is in make sure he can't get out),
put a line of baby powder along the bottom crack of the
door (or on a piece of paper and slide it under the door --
hold onto one end). Then use the blow-dryer to spray the
powder into a fine mist that will cover everything in the
room.
Practical Joke 2: Make a small, off-center hole in a can of shaving
cream and then heave the can into the victims open door.
As the pressure spews the cream out, it will spin the can
and create a real mess all over the place.