There is a sequence depicting the surgical removal of a human brain including shots of a scalpel cutting through skin, bleeding from the wound and the eventual removal of the brain itself.
Several shots of the removed brain enclosed in a machine are present.
There are a couple of dead bodies shown on screen.
There are a couple of fist fights.
A female victim has a needle injected into her arm and is bleed so her blood drains into a bottle.
Someone is thrown off the first floor fire escape, he falls to his death.
Someone falls to their death from a cliff.
There is a sequence showing a man getting knocked to the floor, the man gets acid from a car battery poured onto his face.
All of the special effects are achieved using dated prosthetic make-up effects which aren't that realistic in appearance.