LOL. I love doing that...my dumbest act almost got me arrested. Me and a couple friends were driving around town, and I had been yelling out wierd things to everyone we passed. We get on the highway, and I see a cop car. I figured "eh, he can't hear me!" It would have been okay, if I'd stuck to something really strange to say, but on an impulse I went with "F*** YOU!"...Yeah. He then pulled us over...not a pleasant experience at the time, especially standing there on the side of the road with his face mere inches from mine. But, like most things, when you look back on it, it was fun.