In the desert, Marty brings Billy the two guns after Hans leaves. Billy takes both guns in his right hand when he starts to stand. When the camera angle changes, though, he twirls just one gun in his right hand.
When Billy is telling Marty about his drunken behavior at Kaya's party, the piece of toast he's eating goes from half eaten to missing only a bite or two between shots.
When Billy begins his assault during the final shootout, the Beretta in his right hand runs out of ammo at one point and the slide locks back. The immediate next shot shows the slide back in the released position.
When the first Psychopath shoots the henchmen in the dog storage warehouse, the blood splatter on Marty's face changes from the front to the side.
While Marty and Billy are standing by the sign that says "No Shooting," the sign changes between loudly blowing in the wind to being still between shots.
After Billy takes a .45 caliber round in the head at close range, he is still capable of talking, etc.
However, Billy states twice that this movie is ending his way, so the audience might just witness his final thought.
However, Billy states twice that this movie is ending his way, so the audience might just witness his final thought.
The masked killer on the bridge throws down two playing cards. In the first shot, those playing cards have a pattern on their back. In the counter shot (showing how the cards land) the cards have matching front and back - both sides show the jack of diamonds. This was probably done to not have to go through repeat takes until the cards landed with the jacks facing upwards.
In the first newspaper article about the Jack of Diamonds killer, the right-hand column has numerous repeated sentences.
The "blood" on Hans's shirt never dries up (it should turn very dark brown within hours).
When Marty calls Kaya to explain his drunken behavior, the phone clearly still shows the home screen without any numbers or contacts being dialed while he's calling her.
Charlie discharges his pistol inches away from Sharice's head. An unsuppressed pistol can easily generate over 140db in sound intensity which is the level at which permanent hearing damage and physical pain are likely (in fact, for most automatic pistols this sound would be around 160db, i.e. 100x times louder on a logarithmic scale).
Yet nobody in the (small and enclosed) room experiences any ill effects and they all appear to be able to talk and hear normally after the gun is fired.
Yet nobody in the (small and enclosed) room experiences any ill effects and they all appear to be able to talk and hear normally after the gun is fired.
Marty wakes up at Billy's place and the little dog has yogurt or ice cream on its chin. Marty has the same on his chin where the dog was licking it.
When Billy is notified by phone of the results of Hans' last hospital visit, he says he will be home in 20 minutes. He took the call in full daylight by the pool and arrived home in full darkness.
When Dennis is in the back of the car and he questions Hans, his mouth only moves for a split second and the dialogue is still heard even when his lips have stopped moving.
Obvious mannequin on fire in the background when Zach and Maggie are sitting on the bench outside the house.
The masked vigilante does not wear gloves and leaves cards he has handled.
Billy says that he stole Bonny near the elephants and then he said, "You think SHE's the one?" Bonny is a male dog and is referred to as a male, except for this one time.