Revealing mistake: When Briar is reloading cartridges in the flop house, he's removing powder from an already spent shotgun shell. The primer is indented.
Next of Kin (1989)
1 revealing mistake - chronological order
Directed by: John Irvin
Starring: Liam Neeson, Ben Stiller, Bill Paxton, Helen Hunt, Patrick Swayze, Adam Baldwin
Visible crew/equipment: When the Gates family is chasing the bad guys in the cemetery and one of them enters the Snake Pit bus, you can see the actor's mark on the floor. (He does manage to hit it.)
John Isabella: I'm truly sorry about your brother. It's too bad.
Truman Gates: Oh no sir. You ain't seen bad yet, but its coming.