I watched Zombie Holocaust (aka Dr. Butcher M.D.) again recently just to make sure it's still the masterpiece I remember it being. And it is!
This movie's so nutty, I just love it. Favorite part is still the suicide who jumps out the window and when the dummy hits the pavement, its arm pops off. Yet, when they cut back to the actor lying dead on the ground, he has both arms attached.
Zombies, cannibals, a mad scientist, nude female sacrifices. What doesn't this great film have? Ok, good acting, for one thing, but the plot's all over the place, the gore is over-the-top, so it's a classic. A minor one, but still...