Because the movie is very surreal, violence is often cut to right in the middle of it with no warning. It's very graphic and gory and sudden.
Shadows are shown of people getting killed; a person gets stabbed in the eye with a miniature, a person gets shot, etc. Because these are in shadow, diamonds are put in place of blood and this isn't graphic.
The movie starts off tame but quickly becomes very very gory.
A woman is seen dead with blood next to her body.
A woman is sliced across the cheek and the attacker digs his fingers in her wound, brief but detailed.
The bar scene is probably the most violent, lots of people are brutally killed in quick fashion.
A man's head is slammed into a foosball table and his face is shredded by the figurines, his bloodied teeth are shown being crunched out of his head and a huge pool of blood is seen. Another man is kicked in the crotch with a blade and when its pulled out, lots of blood gushes onto the ground.
Lots of murders in the bar scene, people get their throats slit open in gory detail with blood splatter and genitals are mutilated by a razor heel. A particularly gruesome scene is when someone is slashed across the head by fishhooks, his face flesh is shown getting quickly and slowly ripped apart and sliced open.
A woman's head is pushed down on broken glass with a foot, she screams in pain and has lots of shards imbedded in her face.