How angry are some people?

Yesterday I politely asked a motorcyclist if he was aware that the ASL he was stopped in was meant for cyclists only. He replied that there was another motorcyclist in the ASL box, but as that hadn't answered my question I asked him again. He told me to fuck of and zoomed away. Unfortunately for him, this was Charing Cross road, so I caught up with him less than 20 yards away and remarked that he was a pretty angry fellow. He replied that he thought he told me to fuck off and I told him that he should learn the highway code before riding aroud. I then proceeded to overtake him and the bus in front and ride in not too much of a hurry, and it pleased me to no small extent to hear him shouting expletives at me which went ignored.

Some people need to chill out.

This makes no sense to me. A guy on a motorbike's in the ASL, why on Earth does it matter?

He's likely filtered through the same as you, where else is he going to go?