Yeah, I've treated a couple.
Running from police, tried to scale and cross wroght iron spiked fences. One took it through the thigh, the other wound up sitting on top with the spike four inches into his perineum. I just did the care after they were discharged. The latter one was in hosp for a month but it missed the major vessels, nerves and the colon, pushed them aside (not really that sharp, nor was the fence).
Had an inmate who would puncture his abdomen with sort of sharp objects. Done slowly and carefully it would maybe put a hole in his omentum, but the bowels and mesenteric vessels moved aside, especially after the third or fourth time he did it. Crazy.:wacko: