What's the funniest thing you've ever seen whilst in a car?

It wasn't exactly while I was in a car but was lots of fun anyway.

When I was training for triathlon I used to cycle to work a couple of times a week (60 km/37 miles each way) and one morning, in heavy traffic, a guy in a sports car blasted his horn at me and shouted abuse because he thought I shouldn't have been on the road.

No problem there. It often happened, but the traffic was very heavy and about 6 or 8 km down the road I caught up to him, stalled in heavy traffic. I pulled around outside him, gave his car a little pat on the roof, and said, "How're you going mate?" and left him eating my dust.

No doubt he beat me to the city, but not by much and I had my moment of satisfaction. >:-)

Once my children and I happened upon a little British car with two huge fluffy dogs sitting in the driver's and passenger seats. It was a colder day so the windows were rolled up. They were just sitting there facing forward, no panting or barking. Looked like a little comedy, two stuffy, upper crust dogs driving down the street on a fair day. My kids and I were laughing so hard. Way before camera phones otherwise that picture would be posted!

This guy was literally walking down the sidewalk with no hands, while pissing into the air. No hands, no stopping, just walk-pisssing casually.