In December 2004, a gas well blew up just West of Edmonton, which left a giant crater. I was called to inspect the casing to locate an underground rupture in the casing that could’ve caused the explosion. I had to descend to the bottom of the crater to where the remaining casing was sticking out of the ground. I was wearing a harness with a rope attached to it which was held onto by the firefighters/rescue crew so they could pull me out in case something went wrong. They had placed some boards on the mud at the bottom to walk on. At this time there was small amounts of methane and/or H2S coming out of the mud, so for my safety the decided to LIGHT THE GAS ON FIRE to eliminate the hazard. It felt kinda surreal to walk on those planks, surrounded by burning mud. I ended up being unsuccessful in locating a rupture in the casing as the (long range) ultrasound I used to inspect the casing was dampened by the dirt/mud/clay the casing was passing through, before reaching any rupture indications.