Was replacing the notoriously leaky turbo drain return gaskets on a w123 and had the car up on lift. Had the pan off and sinc I could not get the drain off the pan pulling up decided to get a screw driver in whole leading to the pan. Pushed up with lots of forced, screwdriver slipped and thmb jammed up into nicely machine whole edge taking of a good chunk of the top of my thumb along with thumb nail, jammed my thumb. Man was that a bloody greasy mess , and it amazingly healed ok. Of course managed to clean it and bandage it up to finish teh job same day.