Oil Rig Explosion Caused By Methane Gas 3.15K Ravi Somaiya 05/08/10 09:11AM Filed to: Fire and brimstone Fire and brimstone deepwater horizon Oil spill Rush Limbaugh There goes Rush Limbaugh's theory that environmentalist terrorists blew up the Deepwater Horizon oil rig — a team investigating the explosion suspect a bubble of deep sea methane gas, which ignited at the surface, was to blame. [AP]