Well, honestly, probably one of two of my own. I've posted about both on lemmy before, but:

• When I was seven, I broke the radius and ulna in my right arm. This resulted in what the doctor called, IIRC, a "swan neck break." I don't know if it's a widespread phrase - looking it up online returns a deformity rather than an injury. However, essentially my arm extended normally until maybe a third of the way up my forearm, then curved in a shallow U, then continued normally. I don't really understand how it supported itself in that shape (other than very painfully), but it did. It was back in the nineties and, as mentioned, I was seven; so there are no pictures and my memory of the event may be exaggerating how dramatic the curve was. This mostly no longer has an impact on my life, but if I run my finger down the side of my arm now, around thirty years later, I can still feel where it broke and pressing on the spot causes tingles further down my arm. Also, fun fact: the doctor who treated my arm called me a crybaby.

• The other one was much more recent, three years ago. I slipped on some ice on my front porch and broke my ankle. Because I have a history of joint dislocations and the foot was pointed ninety degrees to the right, I thought it was just dislocated, not broken. I twisted it back to the correct orientation and tried to stand on it ... Twice. I told the EMT's that and I guess the story got around, because once I got to the ER, every single member of staff with whom I interacted asked me some form of "did you really do that?!" The doctor who treated me for this had a much better bedside manner than the one who did my arm, but apparently messed up the repair, according to my current orthopedic doctor, so I'm still enjoying the impact to this day.