Taken out by a fellow cyclist...

James didnt get a great deal of choice about having to stop either! She was at fault, she got ranted at, she will probably look both ways from now on!

If James had been driving a car or riding a scooter/motorbike and gone into the back of her it would have technically been his fault. She might also go away thinking that cyclists are aggressive nutters and she's better off sticking to driving in London, who can say? It's the fact that she asked him if he was ok and he just told her to fuck off several times (his words, see OP) that doesn't cut it for me. He was simply venting his anger and shock at her.