New York grad student and anthropologist Gloria, her brother Rudy, and their friend Pat, travel to a remote part of the Amazon jungle to find and disaprove the local theory of cannibalism among the local tribes when they run into something far worse: a cruel and sadistic, streetwise drug dealer, named Mike Lawson, and his partner, Joe, hiding out in the jungle from murder and drug-dealing charges in back in New York and whom are presently using the docile natives to mine for emeralds and harvest cocca. When the crazed Lawson kills a few natives, including the daughter of the chief, just for his sadistic enjoyment, the warriors turn against their masters and subjuect the two dealers and three grad students to the most horrific torture and murder for their crimes using their own harsh law of the jungle. —IMDb
Umberto Lenzi (born August 6, 1931), is an Italian film director who was very active in low budget crime films, peplums, spaghetti westerns, war movies, cannibal films and giallo murder mysteries (in addition to writing many of the screenplays himself).
Lenzi was born in Massa Marittima, Grosseto, southern Tuscany. He is the writer/director of two highly controversial exploitation films: Mangiati vivi (1980) and Cannibal Ferox (1981) as well as the director of the film adaptation of the Italian comic book Kriminal (1966). He was one of the first Italian directors to get involved in the Giallo film craze (along with Mario Bava and Dario Argento), and his “Man From Deep River” is credited as being the film that started the Italian “cannibal film” genre later popularized by Ruggero Deodato, Jess Franco and others. Lenzi has claimed in interviews however that he was never too enamored of the cannibal films he made, being much prouder of his war films and crime/ western/ action movies… read more
One of the later films to come along in the cannibal exploitation craze, CANNIBAL FEROX, aka MAKE THEM DIE SLOWLY is less intense and gory than its more infamous cousin, CANNIBAL HOLOCAUST, but still manages to deliver some chills, even if its structure is more awkward and its concept much less original. Low budgets can lead to great, creepy atmospheres, but this is goofy more often than not.
Someone once described this as "the film Umberto Lenzi deserves to be remembered for." That sums it up perfectly. It is one of the most childishly hateful and repugnant movies ever made. An impotent knock-off of Cannibal Holocaust with twice the anger, none of the craft or point and the same cruelty to animals. That Lenzi killed animals because he was jealous of another director (Deodato was getting too much credit for having 'created' the cannibal movie when Lenzi felt he should be given that honour; he's right incidentally and he can have that on his tombstone) is about the most heinous thing he could have done as a filmmaker and the result is terrible.