Black doesn't mean cold My own damn fault. I 'octagonized' a pretty large bar of 180 layer damascus for the purpose of twisting it. I clamped it in a bench vise so I could adjust my twisting tool (essentially the same thing as Charlie's) to size. That done, I took one end between tongs, and then used my left arm to punch the release of the vise. Only I failed to realize that the bar was pretty heavy and long, so it slipped in the tongs and because I reached underneath the bar to release it, it fell on my arm. Thankfully it was black already, but I knew straightaway it was bad because it didn't hurt at all. My wife accuses me of trying to minimize it. And my oldest daughter freaked out when she saw it, and demanded I treat is with after burn cream there and then or she would hound me until I did.