A couple guys installed a train horn on their car. Then they drove around, honking their extremely loud horn at people and videotaping the reactions. Then they set up a website and sold the best reactions to anyone who'd buy them.
As John Mellencamp might say, "This is oooouuuuurrr countryyyyy."
A little of this goes a long way, but I have to say, I love the casual question 14 seconds in.