We got to talking around the shop the other day about some of the sounds we've made in nature, sounds that don't really exist, but were conjured up for a special occasion. It reminded me of one that was created using the wall treatment of a place I used to work. There were wooden slats on the wall that formed a sort of primitive diffusor. They were angled, and different lengths. Somebody hit one one day, and the next thing you know, we were standing around the piano trying to identify what notes each slat came closest to...and labeling the wall with little bits of masking tape with 'sharpie'. We came up with about half a dozen notes that worked well with both the key of 'A' as well as 'E', and seeing as they're good "guitar keys", we were on our way. Each slat was mic'ed with a KM-84, and played like a rather dead sounding 'marimba' with a set of mallets. On one occasion, we went *way* over the top, gated the sound, then compressed the living snot out of the remaining tone. The net result was something that resembled "note tuned explosions". It worked exceptionally well as an additional tone to the snare sound, as well as in the 'solo/breakdown' of a couple of songs. So...what odd stuff have you found that created a cool effect/texture/tone that was an alteration from something that occurred in nature?