Here's an original pour some water into your hands and act like you making a sneeze sound behind one of your friends
do something funny
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pull a prank on him
load their drink with salt (works best with soda)
You can view videos of the skirt pull prank and learn how to perform it from the videos at the YouTube website. Once on the website, type "Skirt pull prank" into the search field at the top of the page and press enter to bring up the information.
they drew on his face
Peter put a dead mouse on Mr. Dussel's bed as a prank.
Put gum in his hair
Give someone a swirly or wedgie
A fart machine in there desk
The best prank apps for iPod Touch 4G are Pallaudio, Scary Prank, and Ghost Camera.
pull a nice good prank