Answer: Vincent Price
Dr. Browning (Vincent Price) was doing experiments to create genetically superior, super-strong people. One of these people, Keith (Michael Gothard), had escaped and began biting people and drinking their blood, like a vampire, to keep up his strength. The police caught him and handcuffed him to a car bumper, but he removed his hand and walked straight up a hill. When he got home, Dr. Browning destroyed the evidence by dissolving Keith in a vat of acid.
Vincent Price starred in many movies, including "Theatre of Blood", "Comedy of Terrors", "Tales of Terror", "The Tingler", "The Fly", "The Ten Commandments", and his voice was used in the song and video "Thriller".