Black Christmas/YMMV

The original:

 * Crowning Moment of Funny: Mrs. Mac is discussing with Clare's father about her disappearance in Clare's room, when he notices a poster of an old woman giving the finger. Mrs. Mac looks at it, and then just nervously smiles.
 * Cult Classic
 * Hilarious in Hindsight: Director Bob Clark later went on to make A Christmas Story.
 * High Octane Nightmare Fuel: The numerous shots of Clare's corpse on the rocking chair in the attic, Barb's murder, the phone calls...
 * Jerkass Woobie: Peter.
 * Nightmare Fuel: The group of caroling children.
 * Seinfeld Is Unfunny: It was, more or less, one of the first slashers.

The remake:

 * Complete Monster: Mrs. Lenz.
 * Ending Fatigue: The tacked on hospital sequence.
 * High Octane Nightmare Fuel: Melissa's death in the UK edition. After having a bag pulled over her head, she gets her eyes ripped out, and is subsequently dragged kicked and screaming down the hallway by her bleeding sockets.
 * So Bad Its Good
 * Squick: Eye ripping and munching, skingerbread men, incest...