Violent animal slaughter: the film begins with a deer in the woods suddenly being attacked by a near-naked teenager who leaps out unexpectedly with a knife. There is a struggle with the animal crying out and fighting, and we clearly see the animal's throat being slit. Blood spews from the open wound for a few seconds. While the animal is slowly dying it is gutted (off screen, but audible) and its blood smeared on the teenager's face, who also eats part of the raw liver. The deer is seen being carried back to a camp, where there are multiple shots of the carcass being butchered.
Animals are slit in various scenes.
Two of kids get injured while climbing (in different scenes). Some blood and bruises are shown.
A teen girl falls down a roof of a house, hits a car, then hits the ground. It's stated that she broke two bones in her leg and nearly broke her neck.
A woman's corpse is carried in a house trailer by her family; the corpse is shown. They later cremate her and throw the ashes into a public toilet. This can be emotional, disturbing and hilarious at the same time, but nothing really violent.
Although the violence didn't make it to get an R rating, it should be cautioned for sensitive viewers.