Several people, including teenagers, are killed in brutal ways throughout the movie. The violence is very bloody, and sometimes graphic, although not exceptionally gory.
A man grabs a girl from behind and slices her neck open with a knife; blood copiously pours from her mouth and neck and pools at her feet, as the killer keeps stabbing her in the chest. The girl's bloody body, with the gaping neck wound visible, is later found by a girl.
A man shoves a knife into the chest of a teenage boy. Blood pours from the boy's mouth and from the gaping hole in his chest; the man drops him to the ground and we see him bleeding. We later see the boy's dead body being loaded into a body bag.
A man rushes toward a teenage girl, her feet are seen being lifted off the ground, and we hear the slicing sounds and the girl choking with blood (offscreen), while blood sprays on her feet and pools on the ground, drenching the leaves; her body is seen being dragged away, and is later found with blood on it.
A man chases a teenage boy and attacks him, slamming his head into a metal pole, and then stabs him in the stomach (we see blood as the man tackles the boy). He then drops him in a river. His corpse in later found on the shore of the river, covered in bloody scratches and cuts.
An angered teenage boy shouts at a girl, as he chases her through a wooded area; the girl stumbles and after standing up appears to have trouble walking (we see her back covered in blood, but there are no visible cuts).
A teenage boy has a vision of a dead girl; she has a gaping bloody wound on her neck, and is drenched in the blood that came out from her face and mouth.
A teenage boy punches another boy in the stomach, knocking him to the ground, and then punches a third boy in the arm.
A man shouts at a teenage boy, and then punches him in the torso; we later see a large bruise on the boy's stomach.
A teenage boy slaps another boy in the face.
A woman slaps a teenage girl.
A girl punches a boy hard; his nose bleeds. She then hits and kicks him.
A teenage boy stumbles and falls into the shallow bank of a river, as he runs to avoid a group of police officers.
A teenage boy wearing a bird-costume terrorizes his classroom, then spews a vomit-like green substance onto another boy, who punches him. The boy in the costume then pulls a cord that releases a brown fluid from the costume's behind, implying defecation. The other boy hits and kicks him, knocking him to the ground, until he is pulled away by the teacher.
A teenage boy tells another that he had killed a man accidentally; he describes how he had fought back after the man started beating him, and how the man fell down the stairs and broke his neck (we do not see it happening).
A man and a woman discuss the murder of a teenage boy's mother with him.
A teenage girl explains to a teenage boy that his father did not die in a car accident, but was a serial killer that killed their mother.
A teenage girl tells a woman that the bodies of three dead teenagers had been found.
A teenage girl tells another girl that a boy had killed people in the past and spent time in mental hospitals.
A boy tells a woman that he had to "bury a friend"; the woman asks him if he had killed a person, and the boy says he was only burying a crow "puppet" that had been "killed".
A girl instructs a teenage boy to punch two others with varying levels of force.
A teenage boy jokingly tells another that he is going to burn down a house with a man inside.
A boy gives a speech to a classroom of teenagers describing how California Condors "eat death," including corpses crawling with maggots.
We see a flock of crows attacking a group of children in a movie on TV.
