This gave me a good chuckle, but the lowly bicycle bell actually commands a lot of power and respect in some places.
http://www.liveleak.com/view?i=416_1314469908
http://www.liveleak.com/view?i=416_1314469908
One of my dads old buddies put a train horn on his truck, worked pretty well, except if you waited at a train crossing until somebody was on the tracks and then hit the horn, some didn't see the humor in it.

I was the one using the train horn early one morning..
The Mr. Important behind the wheel - he needed a Chiropractor and some new designer Depends![]()