There's a lengthy car chase in which one car tries to take out another car. The driver rams into his target's back, and the two continue to drive until one smashes into a truck, but keeps going. The target rams him a few times, and he crashes into a car's open door and a cart, ripping the door off. He then rams his side into a truck carrying several cars, and a few cars fall off onto the street, causing some crashes.
A woman accidentally rams her car into another car's back on a road.
A car is pushed off of a parking garage.
During a group therapy session, one participant gets furious with another participant mocking her, she screams "fuck you!" and literally jumps onto him, punching him, before getting pulled away.
A man has his hands nailed to a wall using a nail gun.
A man is stabbed repeatedly in his office, and gets impaled in a broken window. This is very graphic and intense.
A man is strangled by an unseen assailant. He is later seen hanging from a conveyor belt and it's evident that he has bled to death. Sudden and startling.
A man attacks a couple with a nail gun.
A woman has been beaten almost to a bloody pulp (there are bloody wounds all over her back and neck), and her hands are literally nailed to a chair.
The film opens with a suicide: a woman jumps off a building. The landing is shown in a graphic close-up, and then she is shown lying in a pool of bright red blood, visible even from a high floor on a multilevel building. This scene is crucial to the film's plot as it explains how the main character (the woman's shrink) lost his color vision - this event traumatizes him to the point where he can no longer see red for the majority of the film.