It is not a good idea to forget you have the top down when yelling at other drivers. Especially when driving down Parmer Lane, and coming up on an old piece of junk going 40 in a 60 zone. Particularly when what comes out of your mouth is something to the effect of, "Can't you pedal that piece of shit any faster than that?" It is even worse when the driver of said piece of shit has his windows rolled down.
And, it is even worse than that when there's a bicyclist right there in the bike lane.