My latest favorite was from a football game I worked this year. I flagged pass interference on a 2 point try attempt and it just happens to be against my sideline. All 50 coaches (slight exaggeration) went nuts like I had done something really obscene directed at them, kind of like seeing a cage full of monkies get all riled up. Anyways, as I'm heading back to the sideline for the kick off, I have one coach following me yelling "COME ON YOU'RE BETTER THAN THAT!"
It took everything in my power not to reply "I wouldn't be so quick to make that judgment coach..."