Blowing your air horn when leaving. What do you want man?

We've left a few times on a Friday night during rush hour traffic. There is a short tunnel at the 405 Fwy and I-5 in Los Angeles where several lanes merge and people get easily agitated. I always blow the air horn and then others start to honk. It seems to lighten the move.

The best tunnel though is the one just as you enter Yosemite Valley....you can honk in there until you run out of air.