Raising Cain

A 1992 thriller from Brian De Palma. The film stars John Lithgow, Lolita Davidovich and Steven Bauer.

The film follows Carter, who was once part of his father's cruel research, which left him with several split personalities. Now as a husband and father himself, he is drawn by his other personalities to restart these experiments.

Tropes used in Raising Cain include:

Acting for Two
Catapult Nightmare: Jenny gets one.
Fake-Out Make-Out: After drugging Karen, Carter is in danger of getting seen by two passing joggers. Cain advises him to do this to avoid their attention.
Flatline: Jack's wife flatlines when she sees him kissing Jenny in the flashback.
Good Smoking, Evil Smoking: Cain favours smoking.
Master of Unlocking: Cain developed this skill when Dr. Nix was doing his research on Carter in the past.

Hickory dickory dock. Cain has picked his lock.

Metafictional Title: The title is based on the book that Dr. Nix wrote with Dr. Waldheim.
Name of Cain
Never Found the Body
Nice Job Fixing It, Villain: While taking his lat breath, Dr. Nix accidentally shoots the spike that was in danger of impaling Jack as he tries to catch falling Amy.
Not Quite Dead: After being suffocated with a pillow by Cain, Jenny wakes up in the trunk of her car just when it's going underwater.
The Oner: The four minute shot of Sgt. Cally and Lt. Terri escorting Dr. Waldheim to the morgue in the police station.
The Quiet One: Margo is the only split personality of Carter who doesn't say anything onscreen.
The Reveal: Carter's father Dr. Nix isn't another split personality of him, he has been Faking the Dead and is pulling the strings.
Sinister Shades: Cain sports these whenever he talks to Carter.
Split Personality
Split Personality Takeover: Margo takes over Carter, and if the ending is to be believed, stays in control.
Use Your Head: When Dr. Waldheim tries to talk to Carter's split personality Margo, she headbutts her as part of his/her escape.
Verbing Nouny
Your Cheating Heart: Jenny with Jack.