Based on a book. An excerpt:

In the 1960s, ten soldiers on a training flight were told by the pilot that the aircraft was disabled, and about to ditch in the ocean. They were then required to fill in insurance forms before the crash -- ostensibly so the Army was not financially liable for any deaths or injuries. They were actually unwitting participants in an experiment: the plane was not crippled at all. It revealed that fear of imminent death indeed causes soldiers to make more mistakes than usual when filling in forms.