In the scene where Billy is free falling with a faulty parachute and is grabbed by Roger in mid-air, stunt skydiver Bill Cole was actually holding a mannequin with a blond wig made to look like Billy. Bill's chute opened in a bad manner, pinning his wrist behind the harness. While trying to free his wrist, Bill lost hold of the mannequin at 3000 feet. The mannequin fell harmlessly into the bay.