That's because the best thing to do is NOT to bottle it up: you're supposed to let it go... practice the art of Zen, bro.
I find that motorcyclists get more ****** at other drivers, when those drivers commit some traffic offense/risky maneuver - moreso than they would if they were in a car. This is understandable, since any incident is MUCH more dangerous to the rider than the driver, HOWEVER:
The rider must always be conscious of the fact that it is his or her choice to ride, and by doing so the rider must choose to accept this elevated risk, without inflicting the burden onto others.
The sound of breaking glass is very Zen to some. I also volunteer so my karmic slate stays at about 50/50