Track dude needed to take control of the situation. Get the guy out of the car and away from it. Get the fire taken care of. Instead he acts like a dick and no one else steps up to deal with it. He is the #1 jackass in the situation. Track owner/manager needs to get him off the property fast, before he gets the whole operation sued.
This.
Face full of fire extinguisher would make you co-defendant.
The track personnel have one job in this situation , and it has nothing to do with personalities , language , tax bracket of the car owner or misunderstandings.
The car would not shut off apparently.
A fire hose to the air intake would rectify that in a hurry.
But when an emergency situation occurs , safety is now on the front burner.
That track worker should find a new hobby.
And I did that for neigh on a decade in staging and on the line.
There is not enough money involved to call it a job , but you can still behave like a professional.