Paranormal Activity (2009)

At the age of 78, my late grandmother (may she rest in peace) hula-danced at the Elk's Lodge in nothing but a grass skirt and coconut brassiere.  That moment, as I'm sure the Benevolent Order would be willing to attest, was more frightening than anything in Paranormal Activity, a somnolent verite-style horror film in the vein of The Blair Witch Project (and Cannibal Holocaust before that).

Onibaba (1965)

My first movie of 2010, and ho-lee shit!  War-torn Japan.  A destitute mother and her daughter-in-law, with nary a moral fiber between them, murder samurai and sell the belongings for food.  Mom gets pissed when her son is killed in battle and his best friend returns unharmed, only to make a play for her son's new widow.  The old woman is visited by a samurai in a demon mask who torments her and...