On Oct 1, 4:58*pm, "HeyBub" wrote:

Natural gas explosions blow the bottom of the structure outward then the
room comes straight down.

That scenario used to be taught as the way manufactured gasses like
propane behaved but experience has shown that is too simplistic a
view. Too much depends on the concentration, point of ignition,
construction type and quality, and more to make such blanket
assertions.

--
Tom Horne