Shock One started out as two guys from Perth, Australia, Jay Burns & Karl Thomas. They'd been in a metal band with Rob Swire & Gareth McGrillen, and after they left to form Pendulum, Jay & Karl formed Shock One. Later Jay Burns left Shock One, leaving just Karl Thomas. Originally from Esperance, Western Australia, he now resides in Perth. He has been releasing music as ShockOne since 2005, producing a wide variety of dance genres including drum and bass, dubstep, drumstep and electro house.