I'm glad no one was hurt.
For all of you that always tell members that you need a bigger truck to pull just about any trailer, I think this guy has you covered.
The truck is way overkill.
The furnace is all self contained. The gas line may have broken going to the furnace but, the furnace can not fill the TT with gas unless the plenum has a crack in it.
Maybe the truck was so bag the rough ride it was giving the trailer caused a line to crack.
The stove getting accidently turned on is another possibility. RV stoves always looked unsafe to me. I can't believe that they still allow a gas stove without so much as a thermocouple and a pilot light. Stoves like the ones in our RV's were outlawed in houses in the 40's for heavens sake. It's time they got rid of them in RV's too. Unfortunately that will probably not happen until a lot of people get killed and it makes the news.
I'm not trying to start a argument here I'm just saying that RV stoves are unsafe.
Glad no one was hurt and have a nice day.