Lots of sexual innuendo, including some crude words

There's the brief after-scene of sex in a car, where a boy climbs out of a car and shows some other boys what looks like underwear.

A young couple begin to make love, climbing on top of each other on a bed clothed nothing shown very short.

The above-mentioned couple's sexual union is shown in much greater detail later on, having been filmed on a video to be shown at a party. The faces are shadowed, but the bodies are clear, including the sides of the woman's breasts and bottom. No male nudity.

The rear-ends of several men are seen while changing in a locker room.

A coach humiliates a football player by stripping off his pants and revealing his jock strap and remarking that he thought he might find a tampon. There is a closeup of the young man's bare buttocks.

Several teen boys reveal a game that calls for sleeping with girls for "points".

A woman and a boy are pierced through the forehead with what looks like a fire stoker (we see a close-up of the woman's very bloody forehead).

Lots of people are cut when plate-glass windows shatter; we see someone's head rolling across the floor, lots of blood splattered on the walls and floor, many bloody people (we see a girl spitting up blood) and many bloody corpses.

In one scene, and several brief flashbacks, a girl jumps from the roof of a building and lands face-down on a car (through the windshield, we see her face hit and see blood pour from her mouth)

In a dream sequence, we see lots of blood running down a car's cracked windshield then see a girl with blood all over her face and mouth.

Several CDs pierce a woman's torso (we see lots of blood).

A girl's eye glasses shatter and her eye sockets are very bloody.

A girl shoots an arrow through a man's crotch (we see lots of blood).

A boy shoots a girl in the hip with a flare gun, her dress catches on fire and she falls into a swimming pool; the water turns red from her bloody wound.

A girl pulls a boy into a swimming pool; he drowns after he's hit in the head and then trapped in the pool by an automatic pool cover.

Several people catch on fire; we see one of them with a badly scarred arm in a later scene.

A burning beam and a burning piece of a roof fall onto two girls.

We see a dog run over by a car; it's badly injured but survives, and we see it wearing a cone around its neck in later scenes.

A man slaps the back of a boy's head and a man slaps a woman.

A man repeatedly pounds his head against a wall.

A window slams shut on a boy's hand (we later see him with bandages on his hand).

A boy is flung from a balcony onto a covered pool (he's not injured).

Boys throw a brick through a window and people throw eggs into a crowd.

We see a girl get doused with blood.

A woman puts red paint on a girl's face; in a later scene it looks like blood.

A girl has bloodstains on her shirt from holding an injured dog.

A bloody hand grabs a woman's arm.

A boy vomits. Non-stop bloody violence in the prom scene.

About 12 F-words and F-word derivatives, lots of anatomical references (one is written), lots of scatological references and several mild obscenities and insults.

There is no smoking, but teens later drink what could be alcohol at a party

The final fire scene at the party is pretty frightening.