I learned .... a little too slowly it would seem.....that when you are working on the car, if you are doing something and it goes through your head that "if I happen to drop that 11/16 spanner while I'm under here tightening that exhaust flange, it would probably hit me in the head and give me a black eye" that you are probably right, and should stop what you are doing before it happens.
Its a bit like when I was in the shed for some other reason and I thought, "that's right I just wanted to cut off that piece of steel with the angle grinder". I did this too, wearing only jandals and using my foot to hold the steel steady. I thought "gee I wouldn't want that angle grinder to bite in now!" You guessed it..... what a dumb arse. Could have been worse but I was lucky to get away with just a flesh wound.
Now, if it runs through my head, I have second thoughts!
