Within seconds of a methane gas pocket rupturing, the gas surges up and erupts on the surface without warning. If a ship is in the area of the blowout, the water beneath it would suddenly become much less dense. The vessel could sink and sediment could quickly cover it as it settles onto the sea floor. Even planes flying overhead could catch fire during such a blowout. Although he doesn't agree with the methane hydrate theory as an explanation for the Bermuda Triangle, Bill Dillon, a research geologist with the United States Geological Survey said that, "On several occasions, oil drilling rigs have sunk as the result of [methane] gas escape."