Years after the filming, Umberto Lenzi said that if he had known that Robert Kerman (Lt. Rizzo) was a porn actor, he wouldn't have hired him (neither in this nor in Eaten Alive! (1980)). Ironically, Jake Teague (University Professor) was also a porn actor, and like Kerman, also appears in both movies.
Rudy:
What a wasted vacation.
Gloria Davis:
And maybe our lives too.
Rudy:
Yeah...
(at around 28 mins) When the group arrives at the village, the corpse of the Portuguese is decomposed far more than it would normally be after one day, even in the rain forest. Also, other people who died before him weren't decomposed at all.
Various restored and uncut German versions were released in Austria by different firms (the first on was JPV video) and distributed in videostores all over Austria to rent or buy.
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