Agree with most of the comments made here about the film. Fuller comes up with some imaginative film techniques to keep this low budget effort watchable. While it is silly on a large scale, it is notable for some of its social commentary. To have the black patient at the asylum spouting the same kind of racial epithets that you could hear espoused by some of the white politicians of the era makes you more fully aware of the level of insanity at which their fearmongering arguments are made. Nice touch in an otherwise overly manic effort. Compare this with "Twinkle, Twinkle, Killer Kane" or "The Ninth Configuration" -- another 'inmates in the schlock corridor' movie which had its own brand of social commentary.
Review of Shock Corridor
