Amusing, but not amused, cop

I was stuck in the Gaslamp Quarter last night after a drop-off at the new Hard Rock Hotel on 5th Ave and K street (or is it L St?). I think they were surgeons, based on their conversation. After sitting in a line of cars that was stationary for no apparent reason (after dropping off), I tapped my horn once, briefly. A voice tried to speak to me through the passenger window, which was open. I turned down my stereo and looked, finding a bicycle cop. "What?" I asked. "Horns are for emergency use only," he said, "and trying to get cars to move is not an emergency." I stuck my head out the driver window and bellowed as loudly as I could: "Let's get a move on!!!" I looked back at the cop, who had a blank expression. He has dealt with my kind before.