Concord, Massachusetts. I remember standing at my second grade teachers desk, helping her staple reading packets.
I felt a sharp pain and looked down to see a staple embedded in the pad of my left index finger. I'd never seen anything like it, so I promptly fainted.
The worst part of the experience was that the school nurse wheeled me out of school in a wheelchair, and made me ride the bus home (I was a walker).
No permanent damage.