As in the Office Booby Trap
you need a place to set it up at. behind an OPEN door is best.
-Now tape the Trap down behind the door.
-Tape the string to the door.
-Set the trigger.
-Blow up the balloon and tape it close to the thumb tack.
-Now all you have to do is wait for your unsuspecting victim. Hahahahaha!!!!! Special thanks to PocketSized
for the approval to have a sequel to one of his instructable The Office Booby Trap