I agree with everyone else who has posted replies to this topic ...... REPORT HIM!!!! Complain to the bus company and the police, and if they don't take any notice ... then complain, complain and complain again!!!
I'm a fairly new mtb rider and I'm terrified about taking my bike on the road, even to go down to my local shop, because cars, vans and buses don't even seem to notice that I'm in existence!
I drive a Mitsubishi pickup truck and I'm always really careful when I overtake a mtbiker as I don't want to push them off, even with the backdraft from me rushing past.
I think all bus drivers should have to take a cycle test before they are allowed to drive a bus, that way they'll know how scary it can be!!
Also (my final rant , you'll be glad to hear!) I bet you that if you were riding on the same pavement as the bus driver was walking then he'd have a moan about "Things with wheels are meant to be on the road, only feet should be on the pavement!!"
Enough of my moaning, over to everyone else ....!!
Best Wishes,
Lollipops, xx