It is sad when decent actors are involved in cheap rubbish like this that squander their talents. Most notable are Stuart Whitman, who is a very competent actor but when placed in a cheap jungle thriller, albeit lacking any thrill, one wonders why they stooped so low. This is absolutely one of the worst films I have seen, it is amateurish, directed by some hack René Cardona Jr., who did numerous other junk that probably isn't worth seeing either. Evident are a lack of story, character study or anything that resembles "action", instead, one dumb scene is added to the next. The editing is incongruent, many scenes looked as if they were filmed in the same "jungle location" or a mediocre studio. Loud music and dumb 'moments' signal the start of the supposed action, such as a man falling into a river and showing stock footage of crocs going into the water, not very exciting. There was a stupid Fulci scene in where a man is "torn" to pieces by small crabs in one of the most absurd scenes ever. The acting is atrocious from the minor leads, who can't even speak English very well, and it ruins their credulity. Donald Pleasence, who is also normally very good, was terrible here. There is nothing to motivate the audience, this is entirely dull and a complete waste.