A car drives over a handheld tool that is on a raceway causing the car to lose control, flip over and crash in flames into crowded bleachers (we see people thrown by the ensuing explosion and others are running)
We see damaged racetrack bleachers and rubble and then see a flashback to the accident that killed many people (we see people being killed in the same manner as listed above).
A man falls backward and is impaled through the back of the head and out the mouth by a wooden spike (we hear a crunch and see the bloody spike).
A man is impaled through the back and out the chest by a metal pole (we see the pole poke through his chest and there's blood at the exit point).
A woman in her car is stuck when a car wash mechanism is jammed, the car's sunroof opens, an overhead water pipe breaks and pours water into the car, the woman struggles to get up through the sunroof, the hatch begins to close again while her head is still out and it presses against her throat (she is pulled out and to safety).
A man is found hanging from a rope, he gags and twitches and the rope breaks (he's OK). He describes having tried to commit suicide by taking a bottle of pills that he threw up; trying to leave the car running in the garage but the car kept stalling; and trying to hang himself and the rope breaking.
A woman is struck in the head by a car tire, her head explodes and we see blood and matter, and remains of the head are separated from the body and an exposed vertebrae.
Two people are sliced at the waist by a flying piece of metal (we see their torsos separate, with a lot of blood, from their legs and the pieces fall to the ground).
A man falls backward and is impaled by a wooden spike.
A gas tank shoots at high speed into a man's chest pushing him into a fence and cutting his chest into diamond shapes (we see the flesh and blood press through the fence and a piece falls out leaving an open, bloody hole).
A man is sucked to the bottom of a swimming pool when it begins to drain, he becomes stuck to the drain opening and the suction increases until it sucks out his intestines, which shoot out a pipe on the surface (we see bloody water spray and intestines and organs spit out onto the ground).
A speeding ambulance strikes a man and we hear the impact and see blood and matter strewn on the road and the side of the ambulance.
A tow truck slips into gear and drives down a road, a man tries to get in to stop it, he cannot, he stands in the street yelling, his foot is snagged by the hook and chain attached to the back of the truck, he is dragged along the street, the chain catches fire and he does too; he screams and flails, the truck explodes and the man's severed, flaming head lands on the ground close to another man who is watching.
A woman falls onto stairs while trying to leave crowded bleachers, she is knocked down, then trampled, she rolls over (we see blood in her mouth) and a car's engine block sails through the air and slams into her chest (we see more blood spurt from behind her and she gasps). Large cement bleachers collapse onto people trying to get to safety (we see two people with bloody faces lying motionless after they have been crushed).
A rock is thrown from a lawnmower and strikes a woman in the eye; she falls dead on the ground and we see a large, bloody hole where her eye had been.
A woman falls on an escalator and is pulled toward its gears: a man tries to hold her, her leg is caught and she is pulled in (we see blood spurting, blood pours from her mouth and we watch as she is completely crushed).
An explosion in a movie theater throws debris into a crowd and we see a woman with a piece of wood impaled through her chest, and nails in her face (lots of blood is coming from the wound and her mouth).
A man in a hospital bed with bloody bandages tries to crawl out of his room when the ceiling begins to leak, and he is crushed when a therapy pool crashes on top of him.
A man's arm is pinned to a wall by a nail gun firing after it falls to the floor (we see blood on his arm). We see several bodies being zipped into body bags (no wounds are visible) after an accident at a racetrack.
A scaffolding collapses onto a road causing a semi to swerve and drive through a cafe window and we see X-ray images of three people killed: one is crushed under the truck tire, one's neck is snapped (blood spurts) and one is slammed into a brick wall (blood spurts). The opening credits are accompanied by X-ray images of human skeletons being impaled in a multitude of ways and several of them spurt blood.