Only thing I've ever pierced was my left foot accidentally with an X-acto knife. That was a fun night...
It was years ago and I was sick at home. I sat on my floor building a model for hours, like from 6 to 12. Actually it may have been later, since I remember finishing when Conan came on... Anyway, I cleared all off my paint brushes, paper towels and newspaper to one side and put all the pieces in the box. I set the finished pieces on top of my desk to dry. I stood up to stretch and soon realized that I had to pee worse than I initially thought...
Anyway, I got up and stumbled around. I had been sitting Indian style for pretty much the whole thing and my legs were asleep and beyond numb. I remember stumbling to the door and getting to the stairs. Every alternate step, I heard a small *clack*. I thought I may of had a piece of plastic stuck to the bottom of my foot, but I didn't care--I just wanted to piss!
After I went, I heard the clacking sound again as I moved to the sink. As I looked down, here was the x-acto, sticking out the top of my foot. I pretty much panicked and held my foot over the toilet. There wasn't much blood and my legs were still asleep. I called for my dad, he was in his office across the hall, but he was asleep and couldn't hear me. About a half hour went by and I finally got the courage to pull it out. I actually managed clean it out and to get the bleeding to stop and coated both the entry and exit wounds in nu-skin... Fun stuff.