... and, more seriously, the DC10 (or was it a Tristar?) which suffered an engine separation when pilots thought it might be a good idea to see what happens if you cycle a breaker for one of the engine speed sensors in flight.
It was a National Airlines DC-10-10 in 1973. There was one fatality: a passenger who was ejected while still in his seat when a fan blade penetrated the aircraft (the whole engine didn't separate though).
Wikipedia summary and it's detailed in Macarthur Job's A
ir Disaster 1.
I've been amazed and disappointed to read this and the D&G thread on the QF2 incident. I hope the flight crew are recognised by the company and that some notice is taken of how close they (the company) came to a far worse outcome.