Grimace: Track was made from cut-up source sounds of contact mic, vocals, pedal effects, etc. It'll probably be released as part of a 3" CDr of all new material (3 tracks in 20 minutes, track one being 11 or so minutes by itself) on Ghost King Records, most likely titled Gorelectronics...
If you mean the high pitched part, probably just echoed feedback or something. I can't remember how I did everything I did...a lot of that track is haphazard Ctrl+C/Ctrl+P'ing with little to no care for where it went, just to see how it came out...in the end, I think it came out pretty good!
O and thanks! Expect more of the same on the CD when it comes out...