A teen boy's head is hit on a water fountain, the killer cuts his tendons, then takes two chains and puts them on his face and starts sawing the chains in his face until his face is mutilated.
The upper-half of a teen boy's body is crushed by an engine. The lower-half falls along with some of his intestines. Blood splatters onto another teen boy.
A teen girl has her back cut by a chain; she runs into the bathroom and grabs a toilet tank lid. The killer then breaks the wall down and hits her in the head with the lid. The lid cuts into her head and breaks her skull.
A teen boy is on his computer and is sitting under a skylight. A hook breaks through the skylight and goes into his back. Another hook comes and hooks his jaw. The killer drags him through the skylight and he dies.
A teen boy is wrapped in chains and set on fire.
A police officer is killed offscreen.