I'm with you.That is hot....and there was a burning trailer.
Panic, I think, is more likely.This had to be malicious. Who drives a truck and doesn’t see that in the rearview mirror?
I'm thinking maybe he didn't want to stop for fear of his truck catching fire. Not sure how that answers that he was able to unhook the trailer after towing it for several miles while burning...Panic, I think, is more likely.
This is the kind of advice I’m here for!if whatever you are doing isn't working, you do something else...even if it's even more stupid.