in high school we had this really old history teacher and people would fuck with her all day, like throw clear marbles up and down the aisles of desks. she could hear them, but couldn't see them. or super glue change to the ground and watch her try to pick them up.

well one day they taped the part on the phone where the receiver sits down, then had someone call the room. so she kept trying to pick the phone up, but it wouldn't stop ringing.