Fell asleep in the middle of a match. Literally fell asleep in the middle of a tag team match working with Cowboy Bill Watts when he was still wrestling.

I heard this on The Ross Report when he had Sting on the show and they were talking about Red, who trained Sting. Bill Watts was in the ring selling, Red was on the apron, one arm on the top rope, the his head on said arm, when all of a sudden his legs gave way and he took a sudden bump from the apron with nobody near him or the ropes.

Did not know this, but it's totally hilarious,

this is why you don't overuse rest holds. I'm sure Taker fells asleep during one of his last matches