I dunno, probably that time where i had placed a dumbbell on a half-meter high table, and it rolled down. First time, it barely missed my foot, and i was like, "HOLY SHIT, IT ALMOST HIT ME! D:", and when i place it on the table again, it rolled down again, and smashed down right on my big toe. That got me a limp for about a month, and a new toenail. Also two weeks free from school.
But the cold hard fact is that it hurt like (bleep)ing hell, and my toe is still slightly deformed to this day.