I had one of those today, but thankfully he decided discretion was the better part of being a loudmouth jerk, and he left so quickly I never even had the chance to use my people skills.

I turned off the highway into the Wal Mart driveway. Nice broad driveway, could be three lanes wide, but is only two. I was close to the center line, but I was completely within my lane. I was just putting along, since I was about to make another right turn towards the gas station.
That second turn, the one towards the gas station, is only about 100 yards from the highway. I was about halfway there, when an oncoming car screeched to a halt, and I see the guy's head bobbing out the window, and his hand waving like he's motioning me up. Since he was standing still about 30 yards away, I pull up slowly and start to roll down my window.
I barely got the window cracked when he yelled, "What the hell is wrong with you?!" Then he floored it and took off.

So I scratch my head and continue on my way. A cart wrangler was standing there staring, so I asked him, "Yeah, what the hell's wrong with me, driving on my side of the road?" He just shook his head and said, "I don't know, sir!"
So, anyone else have any good crazy people encounters? I know our LEOs do!
Kevin