Absolutely lame, but age 12 I remember the worst most intense pain I ever felt was sitting on my own thumb after pulling a wooden stool towards me - crushed it right on the edge corner and it was so intense.
Way more painful than the time I got a drawing pin (thumbtack) half embedded in my heel, impaled my wrist on a set square, or winded myself falling chest-first off a skateboard.
I've been pretty lucky/sensible
Another freaky thing; you can hear the difference between hot and cold water being poured. True fact