snakes or snake like appendages.
red blood, black blood, green slime
mystic symbols painted in bright paint on walls, mirrors, doors.
taunting messages ditto.
So the anti-cliches are bright sunny days, beautiful devils and smiles.
I think your anti-cliches might be cliches in their own right. How many times have we seen, basically:
EXT. NEIGHBORHOOD - AFTERNOON
Everything looks calm and peaceful. Children play happily as et cetera etcetera blah blah blah
All part of setting it up so that when the horror happens, it's "unexpected." Because people forget what movie they went to see? Or maybe they just say "Two, please," and let the movie be a surprise?
Actually, that sounds like a good idea. I might be more entertained if I don't already have a detailed ideas of what cliches to expect....
This is the year I get published. You should all be yelling at me for spending time here instead of polishing things for submission.
And also, how DARE the Alien saga take my title "Prometheus?!?!?"