I've gotten into corners too hot before and crossed the centerline while trying to scrub speed and get the bike turned. I'm a former expert level roadracer with lots of class championships to my name, along with a ton of accident free street miles under my belt. I practice safe riding techniques, consider myself a student of safe riding, and am here to tell you shit happens. Usually you get away with it and spend the next two months scolding yourself for the stupid move. Sometimes you don't and make the local paper.
Everybody screws up.