Married man and woman kiss multiple times; one instance of them having intercourse (nothing shown) with woman getting on top of man her nipple seen subtly in dark, but can also be missed as it happens quickly.

A car explodes, and the car's owner is punched in the stomach.

A man's body is mutilated though the actual act is not shown; his body parts are thrown out into a water body and you see the cut up limbs being thrown out individually.

In a train tunnel, a young boy is roughed up by some bullies in a flashback. He kicks one in the face, and the bully stabs him in the stomach with a switchblade (mildly bloody; not graphic). A train comes and smashes into the bullies' car as they get in, presumably killing them and causing an explosion.

1 use of "damn"

There are several scenes of teens smoking.

Many frightening scenes -- just when one thinks there is calm or some kind of peace, the subsequent turn of events leads to terror.

There are a couple of intense scenes showing zombie-like transformations.