Why were you barefoot in the first place?
Because you thought it was "cool"?
Seriously.... why? It was not really because if the pedals, was it.
I can't speak for the other guy, but I'M barefoot on stage because it feels good and I'm willing to accept the risk of injury for the trade-off of feeling super-comfortable.
I am barefoot anywhere I can get away with it because it FEELS GOOD. I've never been hurt from being barefoot but have been injured by my (physical therapist-recommended) shoes.