One for the machinists out there...
I was running a box of old drill bits through the electric sharpener and noticed one that look a bit odd...the cutting edge spiral ran the opposite way to all the other drills .
I put it it in my cordless, unsharpened, turned the reverse switch on the drill to anti-clockwise, and it zipped through a piece of scrap wood no problems.
I never knew such a thing existed. The question is...why on earth would you want one?.
There will no doubt be plenty of comedy answers, I just wondered if anyone actually knew.