Stupid bus drivers!

This morning, on my way into work, I was on a large roundabout doing about 35. I was just approaching my exit when a bus just came straight out onto the roundabout at speed - he never even bothered to slow down. Seeing as there was a car in the other lane, I had to slam the brakes on. If it hadn't been for the slave trying to yell instructions from the passenger seat, I'd have got the bugger's number. I really hate these 'my vehicle is bigger than yours, so I'll do what I want' drivers.