A little thing I dinged out in Milkytracker as Practice.
It's the TROMBE~! theme. I figured I'd post it here since you guys are more mech oriented than the rest of the site (Five especially)
Be warned, this is only a 20 second sample of it, and it's a .xm file, meaning you'll have to open it in Winamp. I've also improvised using generated sounds, such as Square, Sine and Sawtooth waves with a pair of drum samples I nicked from another song.