Eh, the best Donnie Darko moment was the teacher screaming about Donnie telling her to stick a Lifeline Exercise Card up her ass. Donnie's dad's reaction was absolutely brilliant. That's how my dad would have reacted.
Here are my noninees.
Jason X: The sleeping-bag kill near the end. Genius. A Nightmare on Elm Street: Johnny Depp being devoured by his bed. Dead Alive: Any ten-second segment from the end of the movie. I've never seen so much gore in my entire life.
And just to throw some non-horror movies into the mix.
Tombstone: Doc Holliday twirling his booze cup. X-2: Wolverine going berserker on the soldier in the kitchen. I nearly shat myself. Equilibrium: Preston owning that group of soldiers in the Nether.