Massive flying debris crashes through gas station roof - GIF

[desbromilow]

looks like an explosion from the utility caused a pressure wave upwards which then dislodged the roofing material (slats to form the "ceiling" of the petrol station awning). The blast appears to originate from the vehicle, and the blown out panels on the LHS and vehicle roof seem to imply the forces originated from inside the vehicle, rather than from above it.
If I had to guess on cause, I'd lean towards petrol vapours from a faulty container (what's in the back of the ute?) or tank, getting to explosive range, and then ignition from static, or and electrical source.