Once had a buddy, when we were in high school, who buried one hook of a treble, in his knee, well past the barb. As tough a guys as he was, he couldn't conceive of the idea of pushing the point back through the skin to clip it off. So, we drove back to town, to his dad's office whereby his dad, an ex-Marine, grabbed a pair of pliers and just yanked it out! OUCH!