No big deal, just curious to know if it was a nerve I hit or what? I put the pin into my calf slow as usual and all of a sudden, I felt like a jolt in my calf and within the blink of an eye I had pulled the pin back out without even noticing I did! So I tried it again an inch higher and everything was fine. The area is just a little more sore than usual. Is that what happened, did I hit a nerve?