I drive a car and ride a motorcycle in London, occasionally I also cycle. I simply do not understand what this driver's problem is.. he should be ashamed of himself. He should also be careful with that attitude.. luckily this time he came across someone who was passive; not everyone is like that. Things would be better for him if he didn't go around looking for trouble..
Tried to kill you?? Did I miss that bit??
Do you realise the circumstances in which you are legally allowed to sound your horn?
Put this down to experience and learn the lessons from it.
Clearly the lack of Iron in his diet making him a bit leary.