Originally from Cambridge, Bullock got his start in the late 80s in the U.K. with the Tonka crew alongside DJ Harvey. In 1991 he moved to San Francisco and joined the Wicked crew alongside Markie, Jeno, and DJ Garth. Wicked were critical in creating and promoting the West Coast psychedelic house sound. Bullock was known for his enthusiastic and unpredictable late night sets. At this time Thomas produced downtempo music as Mammal. He also made a psychedelic album under the name Supergroup with Charles Uzzell Edwards.

In 1996 Thomas moved to NYC and started A.R.E. Weapons, which pioneered the electroclash sound. He left the group a few years later to start his current projects: the Rub N Tug parties, his balearic rock band with Harvey called Map of Africa, and a barnyard punk project called Bobbie Marie. He also produces house music as Mirror Boys for Garth's Grayhound label in SF, and does re-edits as Otterman Empire for Whatever We Want Records in NY and as The Hankins Mountaineers on his own STD imprint. He is also a prolific remixer under his Welcome Stranger guise.