Things that made no sense whatsoever
Pat Hingle calling Bill Bubba when Hingle's character is named Bubba.
The Bible salesman fake death. Why does he sound like that? Like a robot or something? Does being hit by a car and near dead make you sound like a synthesizer? He's revealed to still be alive when he he grabs Deke, but then dies seconds later. LOL, what?
Why did they refuel trucks? They had a rocket launcher, grenades, and a shit ton of guns - and later easily take out multiple cars/trucks. They just sat on their hands for half the movie.
The epilogue. The movie flat out tells us a comet caused the machines to go haywire. Aliens can't send a comet.