The latest suspect in the B.P. oil rig blowout is methane hydrates. The thinking goes that the crew may have accidentally tripped a "blowout" of the gas-infused water ice, which is well known for expanding explosively when melted. It'll make the guys who build the rigs breathe a little easier, but it won't much help the 11 poor bastards who were in the wrong place at the wrong time.