Deliberate mistake: When Okwe pulls the heart out of the blocked toilet, the water doesn't go out of the toilet. (00:07:50)
Deliberate mistake: When John and his sister Patty are watching the old videos, it shows John saying that he would pay for his niece's college education and the camera is showing them from the side. John says "And that's a promise from your uncle John." and the camera is in front of him showing his face. There is no way they could change camera angles like that in a home movie.
Deliberate mistake: In many scenes bullets are shown striking things and sparking (this is especially visible on the attack on Knockout Ned's house when a bullet strikes a chair and gives off a huge spark of light). In real life, only special bullets with incendiary materials (meant for starting fires) cause sparks, and this is only when they're fired against metallic objects. It is impossible that a bullet striking a chair would give off a spark.
Deliberate mistake: When Mr. Roboto is offering Austin a mushroom, the subtitles lead Austin to think Mr. Roboto is asking him to eat some shit, until Foxy reveals more of the subtitles to say "Please eat some shitake mushrooms." The correct spelling for this kind of mushroom is "shiitake." They had to cheat on the spelling in order to make the joke work.
Deliberate mistake: During the fight at the Unity Day Festival, at one point Goblin is confronted by some cops and beats them up. Watch closely... you can tell that the first and second shots are just different takes of the same stunt from a different camera angle. Goblin's movies are exactly the same (except slightly faster in the second shot), and you can also tell it's the exact same two cops he's hitting. They tried to artificially lengthen the scene by showing two slightly different takes of the stunt.
Deliberate mistake: Although much of Auto Focus revolves around the 1960s hit television series "Hogan's Heroes," the producers of this independent film could not work out a licensing agreement with CBS regarding the famous "Hogan's Heroes" theme music. As a result, the familiar "Hogan's Heroes" theme music is entirely absent from Auto Focus, replaced with contrived theme music that isn't even remotely similar to the original.
Deliberate mistake: Early in the movie someone fires an RPG, and, when he does, they show him comically being flung back through the air by some kind of supposed recoil effect. RPGs are rockets shooting out of tubes with the blast going backwards, so the holder of the tube themselves experiences no recoil.