I've never heard of a feeding that bloody before. Was it a f/t rat that exploded? Those are the grossest stories I've run across. Or, I guess, maybe if it was live, the snake's teeth just got lucky and punctured a major vein...and then the squeezing...well.... ewww.

I would imagine that is definitely the exception rather than the rule and probably won't happen again. Even with highly aggressive feeders and live food, I've never seen more than a few drops of blood.