Saved by The Bell

One time back in high school, a friend once said to me at the end of class that we had been saved by the bell.  He must have been taking some sort of mind-altering substances, because A) I wasn't aware of any rescue situation that had just occurred and B) I'd never heard of any superheros named "The Bell."  I decided right then and there that if I ever came in contact with any kind of radioactive substances, that the first thing I would ensure I came in contact with afterward would be a bell, so that I could become The Bell.