Honestly.... venomous spider bite that literally had my thigh
burning, leg hurting/aching from the slightest pressure, and basically bed ridden for a few days
But idk if that's even an "injury" so aside from that I guess I would say:
A concussion and big swollen bump on my head when I ran into a clear glass door while it was raining outside. (when I was like 7-8 years old) (idiot) I literally fell backwards and had no idea what happened, nearly KO'd/dizzy, had to go to the hospital
Other than that I've just had a bad ankle sprain (worse than the typical sprains I always had, needed crutches to get around for a day or two, but obv ankle sprain = not serious at all). Haven't had to deal with anything too bad and hopefully it stays that way