While it would be quite passable as part of a drive-in theater's dusk-to-dawn Halloween jamboree, this leering little fantasy about Siamese twins is over its head when it crashes film festivals and gets promoted as a rival of Vertigo. Because Brian De Palma (Greetings) made it, there has been a tendency for critics to stretch their tolerance unduly. The sick-joke quality of it would be upped a bit if the self-congratulatory quality were diminished. And the jumble of disparate elements — imitations of Hitchcock, grade-Z gore, collegiate comedy, Bernard Herrmann's passionate romantic score — gives the impression of loose screws rattling around inside a mostly empty head. Margot Kidder, Jennifer Salt. (1972) — Duncan Shepherd
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