Weirdest, Bizarrest, most Out-There sounding effect you've built?

[duckpow]

I copied a Devi Ever Soda meiser. And if a Fender Blender is the end of the world, the soda meiser is here to destroy the galaxy!
In the process i dropped my soldering iron down on one of the cap's... and was out of spares.... -.-*

It's still works, but it behave funny!

[morcey2]

The Fartscreamer!   I don't even remember what I was building, but it was a distortion of some sort w/ zeners in the opamp feedback circuit.  It was the first thing I ever breadboarded and I'm pretty sure that I missed a reference resistor somewhere.  If I hit it with enough of a signal, I'd get a very 'flatulent' tone.  It was a great novelty item, but I was so irritated with it that I ripped it all off of there and built a tube amp instead (or a couple dozen).   

Matt