I only know two stories:
Peter North shot a load so powerful back in '91, Christy Canyon lost her left eyeball. She now sports a glass eye..poor thing.
The other is when Vanessa Del Rio completed one her first anal scenes and failed to clean herself properly. The cum bound her cheeks so tightly, she was forced to go the hospital where they seperated her Puerto Rican muffins with a spatula and hammer. Once seperated a corkscrew was used to drill a hole to her balloon knot. Sad...