Re: Whoops - lets do it again and watch this time.
My father worked in a fish processing plant as a student. One day a filleting machine jammed and the operator was going to shut it down to clear the innards, at which point the supervisor said "no" and argued it was easy to get it out and proceeded to demonstrate how to get the back of his hand filleted as it resumed motion. Clearly should have let the operator do what they knew about.
Almost Darwin in action.