I bet the doctors had to pack a lunch to find Richard's brain.
A humorous clip I saw on TV once: Keith Richards was asked about his guitar riff on "Satisfaction..." and he said something to the effect of "I was sleeping when it came to me. I woke up and put it on a cassette. Then, the next day, I played it back and it had a few seconds of this riff and 44 minutes of snoring."