As a firefighter is rare for vehicle to catch fire after accident
Also single vehicle accident into tree - aka driver
drunk/stoned/texting
High rate of speed and starting to spin out indicates passed out or incapacitated while leaning on the accelerator.
High-profile young guy in classy LA neighborhood at 4 am: Somebody was with him partying and they won't keep quiet for long.
So the car hit, engine dropped out, car went air borne and swiveled in the air impacting on the palm tree in the center of the trunk (where the gas tank is under). Fuel pump and computer still attached, fuel injection lines not attached, fuel everywhere, electrical lines arcing (car battery is in the trunk). Result, airborne, possibly caught fire as it did so and impacted the tree. High rate of speed > 100 mph from timing of red light video tape.