When a prop gun loaded with supposedly harmless blanks was fired at the film's star in his character's death scene, its cap became lodged in his spine (after penetrating his abdomen) killing him a few hours later.
The actor? Brandon Lee, Bruce Lee's son.
[Tragically, The Crow (a tale of reincarnation and revenge) promised to be Lee's breakthrough vehicle after several low-budget efforts. Ironically, the crow is a widely-recognized omen of death.]
[In 1983, Lee was expelled from Emerson College in Massachusetts (where he was studying martial arts and drama) for misbehaviour.]