I know that POH says to switch off the master battery switch and I'm sure we can all see the logic in that, however, if you call the gas board and tell them you smell gas in your house they tell you not to touch any switches either off or on for fear of causing a spark and therefore an explosion. Just wondered if anyone had any views, its a fairley big relay that clicks when you through that switch. Personally I think it would be better off but wouldn't fancy being the guy to do it with all those avgas fumes around.
Regardless of what caused the accident, the flying before hand was dreadful. Lucky no one was killed.