Silent Night, Deadly Night Part 2 (1987)

Revealing mistake: Toward the end, after Ricky decapitates the old Mother Superior, a young nun assumes she is alive and taps her shoulder. Mother Superior's head falls off and to the floor. There is no blood whatsoever. The old woman had just been decapitated moments earlier, and there isn't even a drop of blood, not even on the white part of her nun outfit at the neck.

Visible crew/equipment: Towards the beginning, during Ricky's talk with the psychiatric doctor, there is a scene where Ricky is sitting in his chair talking, and at the top of the screen, there is a very noticeable microphone hanging down into the camera's view. A few moments afterward, you see it fly up and out of the camera's view.

Character mistake: After Ricky has just killed his girlfriend with the car antenna, he's challenged by a police officer. Officers would never walk right up to someone who have just committed a murder. Police would always order the suspect into a position that presents the least amount of threat and minimal chance of resistance. Grabbing the officer's gun would never had been an option.

Mercury

Trivia: The house number of the strict, God-fearing mother superior is "666" - the number of the beast.

Mercury

Trivia: The scene in which Ricky screams "Garbage day!" before shooting a man was so unintentionally funny, it became an early internet meme, before the word "meme" was even popularized.

TedStixon

Trivia: Despite only being 88 minutes long (including credits), about 30 minutes of the film is archival footage from the first movie, with less than an hour of the movie actually being comprised of new footage. The entire movie was filmed in only about 10 days.

TedStixon

Ricky Caldwell: My old lady couldn't afford to send me to college. So I got a job. I was washing dishes, dumping trash... all that sort of shit. I think you're gonna like this next part. It sounded like some squirrel getting his nuts squeezed.

Ricky Caldwell: That's enough.
Chip: Oh, it speaks.
Ricky Caldwell: I said, that's enough.
Chip: Listen Bud... that's what she said when I fucker her brains out on the backseat of old Red here.

Henry Bloom: Tell me about Jennifer.
Ricky Caldwell: Eat shit.