It's your typical vacation-goes-really-bad movie with the guide going wacko, and the resulting helplessness of the couch potatoes in the hands of a brutal alpha type.
Lisa Aliff is gorgeous, and all the actors are good, especially the psycho. What's bad is the writing, and the implausability of much of the action. Three's one scene where the psycho chases down one of the gang who has run off at dawn trying to climb out of the river valley. Meanwhile, the other three hostages escape in the raft and try to take it down river. They get turned over in a rapids (this scene is beautifully intercut with the psycho chasing the one hostage down). Then incredibly, the raft ends up in the same area that the psycho has chased the other hostage down. HUH? When I first saw it, I thought they were introducing new characters into the movie, until I saw that it was the same people. Crawling up a river valley does not put you in the same place as a raft that has gone at least a few miles downstream.
It's this kind of inattention to script or continuity that destroys what could've been a decent movie. The action is also the cheesy, slo-mo type of this era, with opponents standing in ways asking to be shot and squibs exploding, and bodies contorting so much it just looks ridiculous.
The cinematography is fantastic, unusually great of the rapids and the falls, benefitting from its location in Zimbabwe, a place you wouldn't go to now. Anyway, fault the producer and the writers.
