My friend Jack was dating a woman at the time when Butch Cassidy and the Sundance Kid was playing, she had the soundtrack and loved it, and insisted he love it too. If you've seen the movie, it has about 10 minutes of background music by the Swingle Singers, the accapella group who performed vocal instrumentals, something like

Obba dobba da, da dobba da dobba da

which is either pretty funny or pretty irritating depending on your mood. Anyway, he was driving with a friend when this came on, and the particular substance they had been abusing caused them to laugh at this music to a level of hysteria which caused his friends eyes to tear up to the point that he drove off an embankment. When the car finally came to rest, upside down, Jack's side was aching where he had broken two ribs, his friend was only partially conscious, and the Swingle Singers were still going

Doo ba doo ba doo, ba doobie doo doobie doo

and all Jack could do was muster the strength to pop the tape out of the deck because, as he says, "if we were going to be found dead, I didn't want them to think that that was the kind of shit we listened to."