So I have this funny prank that I played on my sister. Take a long piece of string and tie one end to her doorknob (she must be in the room) and the other end to another doorknob right opposite of the room she is in. Make sure that it is very tight. When she tries to open the door it will be stuck and she can't get out of her room. tip: before you do this prank you could take all the scissors from her room so if the door opens enough to fit her hand through she can not cut the string. watch and enjoy!!!