Oceans Thirteen: Men start an earthquake, torment a reviewer, and seduce a woman to avenge a conned friend.
Office Space: One guy stops caring about his job, another wants to rob his employer, and a third just wants his stuff back.
Oliver!: Prepubescent exceeds alloted institutional dietary requirements, which leads to him being sold as property and getting involved with thieves, hookers and psychopaths. It's a musical.
The Omen: Satan puts his son up for adoption. Murder ensues.
Once: A multi-cultural couple should get together for love of a vacuum cleaner, but they don't.
Once Upon a Time in the West: A former criminal helps a dying crippled man accomplish his final wish in exchange for gaining a legitimate position in the crippled man's company. However, the former criminal's past comes back to haunt him in the form of a guy who plays the harmonica.
Or: Woman moves to the wild West to meet new family, gets Unwanted Harem. Not a romantic comedy.
Once Upon a Time in America: The histories of a group of former juvenile delinquents is explored. This is a movie about New York gangsters directed by a man famous for westerns.
One Flew Over The Cuckoo's Nest: A petty criminal feigns insanity to get out of prison and is sent to a mental hospital, where he teaches the residents to play basketball and fish, and gives them chewing gum.