This happened in a little town in New Mexico, and even though it sounds like an Alfred Hitchcock tale, it's absolutely true!

This guy was on the side of the road hitch hiking on a very dark night and in the middle of a storm. The night was cold and wet and no car went by. The storm was so strong he could hardly see a few feet ahead of him. Suddenly, he saw a car coming towards him and stop.
The guy, without thinking about it, got in the car and closed the door - and only then realized that there's nobody behind the wheel!

The car starts very slowly. The guy looks at the road and sees a curve coming his way. Scared, he starts to pray, begging for his life. He hasn't come out of shock when, just before the car hits the curve, a hand appears thru the window and moves the wheel. The guy, paralyzed in terror, watched how the hand appears every time they are approaching a curve. The guy, gathering strength, gets out of the car and runs all the way to the nearest town.

Wet and in shock he goes into a cantina, asks for two shots of tequila, and starts telling everybody about the horrible experience he just went through. A silence enveloped everybody when they realize the guy was crying hysterically and wasn't drunk.

About half an hour later two guys walked into the same cantina and one said to the other... "Mira, Pedro, that's the Pendejo that got in the car while we were pushing it!"

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http://urbanlegends.about.com/od/automobiles/a/The-Driverless-Car.htm