My day started very badly, with an argument with a road flagger who told me I had a 'bad attitude'. I arrived at the lane he was controlling; he had his back to me (big no-no) flag down, and a phone to his ear. I waited for about 30 seconds, then grew irritable as nothing was happening (the road was clear). I put my window down and yelled 'Good morning!' He turned around and pointed at the road.
The joke did not land and he waved me through, still not the correct signal but by that point I did not care.