My best, a while ago i was riding a horse and it got spooked by lightening and while running it ran under a tree just tall enough to let the horse under.... but not me, got cleaned up by it and now got a 1 inch scar above my left eye, and a few scars on my back from being draged over a stone path by the horse .
Apart from that i have a few scars here and there as results of various stupid stunts.