I completely lost my temper on an officer once. I was pulled over for 'speeding' -- doing 78 in a 65 when I was moving with the rest of traffic. I was already late for a post-surgery check up appointment, was already really nervous and flustered, so this guy pulled me over at a REALLY bad time.
Officer: "Do you know why -- "
Me: "Are you %@#$ing kidding me?! No, I don't know why you're pulling me over! Why don't you go pull over all the other #$%^ing cars that were going the same speed I was?! Jesus Christ, this is #%$*ing ridiculous! Now I'm gonna be late for my after-surgery appointment cause you figured you'd pull over the speed-racer-mobile that was MOVING WITH THE FLOW OF TRAFFIC!"
I don't think he expected that from me, LOL. He let me go.
EDIT: Just thought of another one!
To make a long story short -- I lived a few blocks from a bar, went out, had a couple (NOT to the point that I was drunk, but I smelled like beer), and people started asking me for rides home. I had SIX other people crammed in my MSP, pulled up to the light outside the bar -- where four cops were sitting in their cruisers, obviously waiting for someone to do something stupid. And my one friend kept goading me into ripping the MSP out of the light, and like the dumbass I am, I did it. In front of the four cops. I was pulled over about a half a block later.
Officer: "Did you seriously just do that right in front of me?"
Me: "Well, um. Yes."
Officer: "Have you been drinking tonight?"
Me: "Well, um. Yes."
Officer: "Don't you think you have too many people in this car?"
Me: "Well, um. Yes."
Officer: " ..... What kind of car is this, anyway?"
Me: "A Mazdaspeed Protege. Limited edition. No one really knows what it is when they see it."
Officer: "It's nice. What kinda stuff you have under the hood?"
*lengthy conversation about MSP ensues*
He let me go, too.