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.

 You then simulate the sounds and experiences of lift off and flight of an aircraft.  You then throw them on to a specially designed vertical wind tunnel (that includes side fans to stop them rolling off) and try guide them toward the friends that are not there getting increasingly scared.