[TheBattman]

Goodness! It looks almost like there was a pile of combustible batteries in that seat! I’m even more convinced that wasn’t simply an iPhone fire (indeed - if this was a thing, we would hear a LOT more about such disasters with massive lawsuits with or without your boss.

[dhs12345]

The phone had burned through the seat and was sitting on the floor in a pile of parts and melted plastic and glass. The wire was still attached. The engine was running the whole time. What if the lithium ignited and was hot enough to catch the seat and fire.

The melted glass indicates that there was a lot of heat.

Hey, here is a thought: the seats are probably heated. It is a Lexus. Electrical or vented?

Maybe the phone started the process, burned through the seat,shorted out the heated seat element if electrical, the car was running and continued to pump current into the seat, igniting the seat...