MANIAC (1934)

Pre-shades of Ed Wood! This exploitation flick has a little bit of everything; academic descriptions of various mental illnesses, nudity, depravity, disjointed scenes, subplots that vanish, but mostly, the most vivid display of over-acting that one could ever ask for!
The portrayer of the mad scientist goes so far over the top that he needs a stepladder and an encyclopaedia to stand on. Imagine Jon Lovitz's actor character magnified tenfold. Amusingly, at one point in the film he calls the actor who is portraying his assistant "a ham".
Unfortunately, this actor's character dies about a third of the way through the story. Perhaps he decided to make the most of his part while it existed by memorably chewing up all the scenery. And believe you me, he had quite an appetite! But, to the viewer's good fortune, his meek assistant (who bears a resemblance to the main character in "Eraserhead") adopts the guise of the deceased mad scientist and begins to emote nearly as profusely as his predecessor. Oh, joy!
The over-emoting runs rampant in this movie as nary an actor appears that does not leave his or her mark.
However, make sure that you have your reading glasses handy as there are several long stretches of verbiage describing different types of mental illnesses that are inserted and scrolled throughout the movie. Y'see, it's educational too!
An actress named Phyllis Diller (but not the same one that we all know and love) portrays Mrs. Buckley, a woman who wishes to mind-control her maniac husband with the assistance of the fake mad doctor. Unfortunately, her husband (who has a great "going insane" scene after being acidentally injected with "super adrenaline") runs amok and kidnaps a young woman who was brought back from the dead (and happened to wander into the scene) and is never heard from again.
As you can imagine, it would be futile to attempt to describe a plot. There are severable memorable lines of dialogue sprinkled throughout this celluloid catastrophe. One of my two favorites is "I may not be decent but I'm sure gonna be clean." This Mae Westian line is uttered by a young lady who is taking a bath. This occurs during "the apartment scene" where a quartet of cuties cavort about in their lingerie and various stages of undress. The other is "The cats eat the rats, the rats eat the cats and I get the skins." That line is spoken by the entrepenurial neighbor of the mad scientist.
There are a couple of disturbing scenes in this movie but mostly it's one hilarious moment after the other.
Sensibilities, be damned---see this flick! It'll take less than an hour out of your life.