I was at the hospital's emergency room for a sports-related injury, and in answer to a question on the form I was given, I replied that I had a serious allergy. The nurse put a plastic band on my wrist and I sat down in the crowded waiting room.

The lady seated next to me glanced at my wrist, shock registering on her face, and then quickly moved away from me. Surprised, I looked at the band for the first time. It read "Nuts."