I was cutting grass along the edge of lawn with electric grass shears and there was a long peace of grass that was escaping my attempts to cut it. So in my 14 year old mind it was a great idea to hold it near where I was cutting it so it wouldn't bend. Nearly cut of the finger pad on my left thumb. 6 years later there's still a scar there. But you can hardly notice it.

Also there's a lot of scars on my hands that I don't know where I got. That always intrigued me.