Now they think that there may be a large bubble of methane undermining the ocean floor in the Gulf. If the sea floor degrades from the pressure it could cause an explosion that would kill anyone near the rig site. Think of it like the scene from an old war picture where the Navy drops depth charges and the ocean blows up only on a grander scale.
If you thought it's bad now
They estimate that this pocket of methane could be as big as 15 to 20 miles in size. An acompaning tsunomi would wipe out Florida.
I'll have to ponder this bit of info. I know shale rock usually forms in layers like a pie crust so the gas must be locked in the rock under high pressure. What surprises me is that it isn't coming out in spirts and then stopping as you would expect. So if you're following this via the video cams then keep an eye out for any cameras focused on the ocean floor.
Later and keep your drums sealed and upright.
Sorry the link didn't work. Try this one or note the URL and hit it yourself http://www.helium.com/items/1866957-bp-oil-spill-methane-gulf-of-mexico