Normally I run the sandpaper across the edge of the sword, last night I figured I'd try running the tip across the sand paper like you would do a knife. Big mistake. I didn't notice that the mouse pad was working its way towards the edge of the work bench with each stroke. Then the sword & the mouse pad & the sandpaper & my hand all went off the edge of the bench. My finger lost the battle. Severed an artery, blood squirting about, 12 stitches & we're just hoping that the piece that was sewn back on has enough blood supply to survive. Sometimes, I'm really stupid...