Klaus Kinski and Oliver Reed both look like they'd rather be anywhere else than on the set of Venom. The plot concerns -- surprise -- a deadly black mamba snake (in fact, it's billed as the world's deadliest). A little boy discovers the serpent, shortly before he's nabbed by a bunch of human snakes: terrorists who intend to hold the kid and his family for ransom. One by one, the villains are dispatched by the mamba, who unfortunately plays no favorites so far as victims are concerned. The film's silliest elements are those snake's-eye-view subjective shots. Based on a novel by Alan Scholefield, Venom appears to have been filmed during someone's lunch hour.