I had a buzz like that yesterday from a panel truck. I gave my usual "Come on, a*!" and then resumed trucking it up a hill.

I've caught up to them in the past. Depending on my mood, I either approach them and have a calm conversation about how they passed me too closely, or I just pull in behind them and shake my head. I never approach them in anger, as that's only going to start a fight. The calm conversation usually results in an apology as they didn't really know where their vehicle was in the lane.

The good thing about exercise is that it dissolves stress pretty quickly. If more than few minutes pass, I'm back to normal and thinking about how I could prevent the buzz next time.