Tromboon

There is an instrument called "Tromboon."
It has really really funny sound. I heard this sound from the radio, and laughed. So I wanted to put a link to its sample sound, but I couldn't find any MP3 format sample, so the best I can do is to put the Wikipedia page which offers the sample in Ogg format. I hope your computer can play the Ogg format.
(Note: The sound is not beautiful nor cool, so you may not like it at all.)

http://en.wikipedia.org/wiki/Tromboon