But finntroll ARE funny

Ooh, and let us not forget the Warr guitar, another tapping instrument only this time with an actual body.

Hmm, I am going to try and find a huge and beautiful example of musical engineering. Somewhere on this planet there has to be a building designed to play when the wind blows through it.

Cajun music always has a neat sound.  I've seen those washboards at jazz fest a lot.

I scare the living hell out of neighbourhood animals with mine. I know for a fact that my cat scatters when he even hears it from a distance, and I've seen other animals pick up the pace when they hear the bullroarer start buzzing. Sometimes, at night, when it's quiet in my part of the neighbourhood, i like to go out and spin the bullroarer for a little while. It always seems to have a different sound on a quiet night than during the day, expecially during the winter. I made mine sort of laurel leaf shaped, out of a piece of poplar I had laying around. Nice sort of sound.
Badgerdude, could you give me some specs for your design? Mine isn't very loud, but it's got a pretty low frequency sound. I'm looking to make a louder one, okay, just looking to make another one, but design specs are hard to come by. Material, dimensions, modifications would all be helpful.  Mine is about 13" long, 1/4" thick, 3" across and tapered on all sides to produce a sort of aerofoil cross section

I don't think an 8 string (octave) bass counts as that weird, as they have been used a few times in popular music, but they are awesome.

My father has a five-stringed violin. Normal violins have four strings. A quick search turned out that earlier in its history, the number of strings in violin's predecessors changed, and five-stringed versions stayed until 16th century. So the instrument is rare, today, but similar ones have been used before.

I found the xyphoon (babmooxofone, bamboo-saxophone) really interesting. Won't start playing anytime soon, though! 

Ha ha, sackbut.