Helium, an environmental Blog, writes of a pending methane gas explosion in the gulf that could wipe out mankind. This item is posted for fun, not because I believe our extinction is eminent. No matter what happens, however, Helium should cease publication soon – either because we are all dead, or because they are puplishing nonsense that has no credibility.
The following passages are from How BP Gulf Disaster May Have Triggered a ‘World-killing’ Event.
Ominous reports are leaking past the BP Gulf salvage operation news blackout that the disaster unfolding in the Gulf of Mexico may be about to reach biblical proportions.
251 million years ago a mammoth undersea methane bubble caused massive explosions, poisoned the atmosphere and destroyed more than 96 percent of all life on Earth.  Experts agree that what is known as the Permian extinction event was the greatest mass extinction event in the history of the world. …
Those subterranean seas of methane virtually reshaped the planet when they explosively blew from deep beneath the waters of what is today called the Gulf of Mexico…
The bottom line: BP’s Deepwater Horizon drilling operation may have triggered an irreversible, cascading geological Apocalypse that will culminate with the first mass extinction of life on Earth in many millions of years.
The warning signs of an impending planetary catastrophe—of such great magnitude that the human mind has difficulty grasping it-would be the appearance of large fissures or rifts splitting open the ocean floor, a rise in the elevation of the seabed, and the massive venting of methane and other gases into the surrounding water.
Such occurrences can lead to the rupture of the methane bubble containment—it can then permit the methane to breach the subterranean depths and undergo an explosive decompression as it catapults into the Gulf waters. 
All three warning signs are documented to be occurring in the Gulf…
Perhaps if humanity is very, very lucky, some may find a way to avoid the mass extinction that follows and carry on the human race.
There are kernels of truth in this story but it reads more like a parody. It is true that scientists believe that methane bubbles have caused great damage and some believe that the Permian Extinction was caused by methane, but a meteor is more likely.
Some of the science is very bad. The claim that previous methane bubble calamities, including the Permian extinction 251 million years ago occurred in the Gulf was an egregious error. There was no Gulf of Mexico 251 million years ago. The continents were not positioned or shaped to resemble what we see today.
That all of these “signs” are occurring in the Gulf, but have been kept secret, is just not believable. But then again President Obama went North on his vacation. He is certainly keeping his distance.