I am guessing from my personal experience, but for the most part people tend to ask more repetitive technical jobs (like testing motors) to people lower in the

I am guessing from my personal experience, but for the most part people tend to ask more repetitive technical jobs (like testing motors) to people lower in the ladder, so (relatively) less experienced people are going to touch the parts more. Then such people are doing the "actual work" and overloaded with tasks, working overtime is a rule rather than the exception. The justification for this is that he was "getting experience" for trying to move up in his career. So all good. Most people are going to remember that he messed up, rather than that he was working overtime to meet expectations, maybe except for the guy that pat him in his shoulder, he saw enough to understand it.