A man steps on a mouse, killing it; a little bit of its blood is seen.
Two men get in a fist fight; no blood.
A man bleeds from all over his face (eyes, nose, forehead), and wipes it, covering his face even further.
A man hit another man in the back of the head.
Light is shone on what resembles (and is likely, though not explicitly stated) blood; there is also a knife with blood on it in the same scene.
A woman stabs a man.
A woman fixes up a wound; blood can be seen around the wound.
A man his another man with a fire extinguisher (likely killing him).
A man strangles another man to death.
Two men have an altercation; one of the men is kicked repeatedly but there is no blood.
A woman stabs a man in the back; he falls over dead, leaving a streak of blood on the wall behind him.