I once almost put a phillips tip with a 4 inch extension through my eyeball just after a noon time smoke session(we call it a safety meeting). I was screwing a 3'' screw straight up into a window header and the drill slipped off. I ended up smashing the tip of the drill off the bone in my face just below my eye.When I turned and looked into the mirror my eye was so bloody I couldn't see out of it and actually thought I got my eyeball. Doctor said if I hadn't hit the bone I would have for sure pretty much popped my eyeball... I still have a perfect phillips tip shaped scar under my eye.I had another safety meeting as soon as I left the ER.