I had a game last year where I flagged a coach for screaming an obscenity at one of his own players across the field. I got in to report to the WH, and the U told me to "pick that ----ing weak BUTT s--- up." I was stunned and could only stare at him, until he repeated himself. As I was a guest on the established crew, I looked at the R (a very experienced one that I like personally, and had a lot of respect for) and told him, "you know what, it's your crew, do whatever the ---- you want with my flag." He waved it off. (Which is why I *HAD* a lot of respect for that R. Past tense.)
Afterwards things got a bit heated in the locker room after the game, with nobody supporting me. I got home, called the commissioner the next day, told him what happened, and asked to not be assigned with that U ever again.