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.
Fresh out of Uni, I thought I'd be a good boy and work harder for my employer at a desk job. After about six months of high stress and little sleep or rest, I'd poisoned my brain with cortisol and needed about 2 years of rehab to be able to read a page of text again.
My cortisol system is still out of whack, probably permanently, sometimes not activating when it should - meaning I can't start tasks or focus or crunch, and activating randomly at other times giving me generalised anxiety for a couple of days at varying intensity.
I'm lucky though, another friend with the same condition lost their ability to walk for a couple of years.