Try as I might, I can’t seem to find a photo of a car without a trailer “jackknifing.” Could you find me a picture of one? Because if there isn’t a picture, it didn’t happen.
As far as a car crash causing an explosion, my understanding is that is a very rare thing, but tragic when it does happen. Movie SFX people have to load cars up with incendiaries to get them to do that thing we see every time a car crashes on TV or in the movies. If I wanted to make something look like an accident, I think I’d be looking at some other way of staging it. OTOH, a burnt up car is a good way to eliminate a lot of forensic evidence.
So you are calling the eyewitnesses liars because you can't find a picture.
Do you have information about a motive that would cause eyewitnesses who happened in the area to make up lies out of whole clothe?
It appears you have some kind of agenda.
The whole point is what happened is extremely rare. It would not have happened unless there were some other things going on that are not acknowledged in any of the accounts. In short, something is wrong.
I honestly think this witness meant “fishtailing” for “jackknifing.”