labanj1:

Why wouldn't you know the cause, the cause is a leak. There is a burner already ignited, except you're saying a phone would cause an explosion faster than an already ignited burner. In this case you cannot attribute that explosion to a phone. A phone rarely causes sparks, so why would you attribute it to a phone, when there is a burner ignited already.

You've chosen not to understand my points. So continue...