While I was working on one of the designs for a UAV I hope to build in the future, I happened to come across the Wikipedia entry on British Airways Flight 9.
Flight 9 was a 747 that regularly flew from London to Auckland, with stops in between. On 24 June, 1982, the airplane flew through a cloud of volcanic ash. All four engines shut down due to the ash. While the crew was later able to restart three of the four engines and land safely, the entire flight was obviously tense during the un-powered glide. The captain (Eric Moody) explained the situation to the passengers in what has to be one of the best understatements of all time.
“Ladies and gentlemen, this is your captain speaking. We have a small problem. All four engines have stopped. We are doing our damnedest to get them going again. I trust you are not in too much distress.”
The full entry can be read at http://en.wikipedia.org/wiki/British_Airways_Flight_9
Remember where the exit rows are!