The following is a common filmmaking joke:

How many grips does it take to fix a light bulb?

I don’t know

None, let the gaffer do it

The informant explains that gaffers only handle electrical work, while grips handle everything else and its disrespectful to do the gaffer’s work if you are not one

Context: this was collected during our in class collection time

Thoughts: I found this joke to be amusing, mainly because you can look at it from two sides. One, that you do the work you are assigned and don’t take someone else’s work. Or two, you don’t want to do extra work, so you leave it to someone else. I find it funny that even where I work retail, we have similar jokes, about not wanting to do extra work too.