News: Scaredive
You start a casual conversation about skydiving with someone afraid of heights, you suggest to them a good prank would be to dive from a plane blindfolded and find your friends (who are also falling) so they can put on your parachute guided via a radio headset. While they tell you about how much they think it is a bad idea your buddies pounce from behind, blindfold them, tie them up and make out like your going to try the stunt.