Here’s a blogger who has some interesting pictures and questions...
http://whitenoise.gizmodo.com/now-im-convinced-that-michael-hastings-car-was-bombed-632980340
In other words, he begins with the assumption that it must have been a bomb and then proceeds to explain how to combat arguments against it being a bomb.
So we have four schools of conspiratorial thought now: (a) it was a bomb, (b) it was a "drive by wire" remote crash, (c) he was drugged and the toxicology report is being withheld for this reason, (d) It was done remotely and a "thermite device" was used to burn the car to cover up evidence.
It's a little exhausting.
All of these angles have the same structure: it had to be foul play, there is no chance it could possibly have been an accident, so we need to figure out how to jimmy the facts to fit the foregone conclusion.