What stupid injury left a long lasting impact on you?
I'll start: I tried to move a bookshelf while drunk about 6 years ago and tore a tendon in my shoulder pretty damn good. It still bothers me sometimes if I move it wrong or sleep on it wrong.
I came off my bike as a teenager and broke my funny bone! So it sticks out now and is easier to bump, and the weird tingly pain it causes if so much worse!