Movies that Don't Answer Why Didn't They Do that Before
A common trope in movies is a character or characters obviously could use a beneficial action except they don't in the movie, or they use a beneficial action later.
Good or great writing will eliminate that from being a plot hole with a logical believable explanation for why a character or characters doesn't use a certain beneficial action, or don't use a beneficial action until later.
Maximum Overdrive
The Trucks finally decide to drive through the diner after the humans left the freakin diner.
That is something the Trucks should have done after being filled up with gasoline except the Trucks don't do that because of awful writing.
Nothing was stopping the Trucks from driving through the freakin diner while the humans were inside.
I've heard a person say that this isn't supposed to be unanswered for why the trucks didn't drive through the diner while the humans were inside which is a lame excuse for awful writing.