Used to cycle 100 miles a week commuting. Once had the head honcho of a business in the office next to ours angrily waving his hands behind me (and behind the wheel of his electric SUV) as I cycled to leave the car park one day (he was beeping his horn which caused me to turn my head to see him waving). It's a massive car park, with parking for 40 or so small offices on an industrial estate, and one strangled lane in and out. People park unsafely, people don't pay attention, don't indicate etc etc. As a cyclist the only way to have some semblance of safety when leaving this car park in the evening at rush hour is to take the middle of the single lane out. He was angry I had done this, very angry, so angry and frustrated that after the twenty seconds (really all it took get get to a much wider, two lane area) of following me as we fed out of the car park and onto a mini roundabout at its entrance he elected to put his foot down and take the wrong side of the roundabout in order to pass me. Had I not heard him rev and realised his intention I would have been hit by him re-merging from the wrong side of the roundabout into the same lane I would be taking.
Ironically he then got stuck in a long queue of traffic only a few hundred feet down the road, a queue which could be seen from the car park. So, he gained nothing, and I like to think he lost. I took the opportunity of him, trapped in traffic, to stop and have a word with him, share my thoughts.
The next morning he came across me in a corridor, and had the absolute gall to say that if I tried that again (having a word with him) he would call the police, that it had frightened him as he had been the victim of a break in earlier in the year. Told me he was a cyclist himself, and selfish cyclists like me who 'won't get out of the way' give cyclists a bad name.
Told him I was sorry he had been the victim of a break in, and that I'd be happy for him to call the police next time as it would save me the bother of doing so to show them my helmet cam footage.