Saw this film on TV as a kid for the first time ( The 4:30 Movie on Channel 7 for you New Yorkers old enough to remember that) and it definately startled me and I never forgot it.
The basic tale is about this rich old woman (Olivia DeHavilland)who gets stuck in her elevator which resembles a bird cage in the middle of her living room. A power failure is responsible for her predicament. Three thugs (which includes James Caan as lead thug !) take advantage of the situation and terrorize the crap out this helpless woman (or is she helpless????????).
In my opinion, this film still packs a helluva wallop today despite its age. It has its brutality at points both physically and psychologically. The ending is very violent and still leaves me stunned (my hair is standing up as I write this just thinking about it again). There is one line uttered by James Caan in this movie which had to be considered so offensive back then (about the old lady's son), I still consider it pretty low yet strangely classic as part of the film.
As of this writing, this film comes on AMC once in a blue moon. Catch it if you can. A commendable effort for a 1964 film that i think successfully conveyed that innocent times in America have been forever lost.
Check out the bit part by none other than the bowlegged Scatman Crothers !!!!!!