I blow off lights in NYC all of the time. Of course the streets are very different from what you have pictured. I'd never pull a move like that.
By "trying to drop you" do you mean you were right on his wheel drafting him? I find that about 60-70% of the riders around here really hate that crap

Which is funny since most of those same riders will happily let you tow them up over the bridge but freak out if you stay too close after they pass you.
I figure if folks don't have the juice to get some seperation why are folks so hot to pass people
all that said... following too close in traffic is dangerous.