By DanS
Date 02-12-2008 23:36
From what I understand they had sniffed for gases and none were present. Also, the bag apparently did not deflate, therefore it almost sounds like your theory might be correct, that the vapors behind the bag blew the bag out. I believe he was welding on a slip on flange also. The back of his head was also singed somewhat which may lead more credence to the bag not sealing properly and then being blown out by the natural gas behind it. The bag must have blown out with a lot of force though.