 During the filming of Gypsy Moths at the airfield in Benton, Kansas,  the director, John Frankenheimer, wanted to get a real, horrified  reaction from the extras playing the audience, so he had a Mannequin  dressed like a skydiver and tied it under a helicopter which  ascended a couple of hundred feet, then released the dummy. Most of  the people hadnt noticed what had been rigged up, so when it fell,  they thought it was a real person hitting the ground and he got the  reaction he was looking for. One minor problem was that the pilot  didnt gauge the wind accurately and the "skydiver" fell into the  parked cars, narrowly missing some people and caving in the roof of  an extras ride. The studio bought the car for several times what it  was worth and the damaged vehicle spent the rest of the shooting  behind one of the hangers.