Was at a plant that lost the refuel floor because somebody left a HEPA on in the corner, with the discharge pointed at the head stand. It was tucked behind some equipment and nobody saw it there. When they set the head.....you guessed it.
Sometimes you gotta take the extra step and walk down the jobsite (even if it means picking up an extra mRem or 2) and asking yourself "what is gonna bite me in the a$$ this time".
I have made plenty of mistakes. I have seldom repeated any of them, at least, not at work.
(My personal life is a loooong drinking story, on the other hand....

)