Didn't know where else to post this.
That 1 Guy is a one man band who uses an instrument he invented himself, which is also attached to a bunch of sampling machines. You can tell there is a bit of Zappa influence, and a bit of primus. Don't know how to explain it, so I've provided some links
YouTube - That 1 Guy - Buttmachine
YouTube - That 1 Guy (Live in Australia) - Weasel Potpie