Lots of scenes of guys stripping down to their underwear for no particular reason.

We see a dead girl with a little blood on her mouth.

A guy is stabbed in the shower and blood covers his legs.

Lots of scenes featuring a knife being dragged along some guy's bare skin.

A guy throws a piece of wood and knocks another guy out.

It's implied that other guys are stabbed but nothing graphic is seen.

None.

None.

A guy suddenly appears behind another guy three times (once as he gets inside a car).