Zombie Holocaust (1980)
Med Student 1: I bet it was you who chopped that hand off!
Med Student 2: Why would you say that?
Med Student 1: Well, didn't you say you needed "a hand" to help you study?
Dr. Obrero: The patient's screaming disturbing me, performed removal of vocal chords.
Dr. Obrero: I could easily kill you now, but I'm determined to have your brain!