That was amazing, especially since you have no idea what he's doing until the very end.
I was sh!tting myself all the way through, though.... reminded me of my woodwork teacher, Mr Brend, who lost at least three fingers in the last few years before he retired. My dad almost lost a finger in a lawnmower, and when he went to Casualty old Brendo was there. I guess he was there most of the time... :?