One that had a big impact on me, over the last 6 months, has been Michael Haneke's Caché (Hidden). Disturbing, dark and ambiguous, right to the end. Superb performances by Daniel Auteil, Juliette Binoche & Maurice Benichou, amongst others.
Not quite as unsettling as "The Piano Teacher" though.
Not quite as unsettling as "The Piano Teacher" though.

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