Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Clever, funny and very dark.

I first saw this on a local PBS station in Dallas in the early seventies. Frankenheimer was using cameras and editing techniques in 1966 in ways that were at least 25 years ahead of their time. As effectively scary as the movie is, it's infused with some really terrific, subtle humor. It's essentially an extraordinarily dark comedy with thick black & white film atmosphere. Little visuals, like party guests firmly holding down Hudson's panicky character in a bedroom all with their wristwatched left hands. Brilliantly written and photographed, it's filled with a great many satisfying scenes that can be savored for their well-crafted intentional absurdities and details.