Me too, but I don't remember it. I was jamming up a hill and woke up in the middle of the road wondering how I got there. Some woman stopped and asked if I was OK, I said yes, but as she drove away I was thinking "other than I don't remember my name". In a few minutes my senses returned and I noticed the busted chain. I was quite lucky.

Be careful of a newly replaced chain. I never take mine off for cleaning. And never ignore an odd rhythmic tic.