check out this horn lol

[Mr Bing]

http://www.youtube.com/watch?v=Jel6cOHYHDI

 

[Sir Run Run Shaw]

That shouldn't be funny, but it is

 

[inaneredstripe]

i got one of these on my bike.
http://www.twistedthrottle.com/trade/productview/2137/
sounds like a truck horn, and has a similar effect.

 

[Ladybird]

That shouldn't be funny, but it is