A man tears open the blouse of a bound woman, revealing her bra. He grabs her bra and is about to rip it off when a man walks in, interrupting them.

There are a few scenes where women with huge breasts are seen in their bra and panties.

There are some scenes where people are attacked by cats and there is blood.

People are being feed into a grinder, but this isn't really shown in any sort of graphic way; it's more implied/off-screen.

Some people shoot other people.

A graphic autopsy is performed on a cat.

There is one scene where a character is smoking a cigarette, and a couple of scenes where people drink alcohol.

People could be frightened by the overall horror themes; for example when people are shown being killed.

Keep in mind this is from 1971 so most of the gore scenes for today's standards are tame but still some of these thoughts are disturbing and still deserves the R rating it was given.