Hmm wasn't the plan to just go straight ahead precisely cause of the mist ? Also I remember their journey took like 5 minutes of various shots of them going straight and following the road ... also the lady in the truck they show in close up is the one that left the store at the beginning of the mist searching for her kid I think ... which naturally points out that the military convo is heading from that direction = from behind Again, I don't mind the shocking ending but this particular part is what gets me on some strange level ... it just doesn't feel right