when i was a kid i had a remote controlled fart machine, used to hide it under peoples desks before class and hit it when it got quiet, always a laugh.
one time i hurt my knee in football and had to go to the doctor, took it with me, and right before he touched my leg i pushed the button...he jumped about 3 feet into the air and looked totally shocked. i thought my mom was going to kill me as after we were done she was walking out the door fast like she was fuming. when i caught up with her
she turned around and was in tears she was laughing so hard 