I think my 3rd year reffing I was doing a JVBoys game. I was being evaluated and after the game I was told that even though my calls were correct and I had a good presence on the court, I wasn't sweating enough.
I needed to look like I was working more.
I found this funny since at the time I was about 22 years old, probably in the best shape of anyone in our association, and was told this by a 60 yo that retired at the end of that year cause he was too slow to keep up anymore.