black water one tense films viewed long time story moves fast follows three tourists all great actors swamp tour butch tour guide small boat soon dropping anchor remote area swamp flipped something huge waterbr br hastily three manage make tall tree nearby realize crocodile attacked them throughout next two days desperately try escape crocodiles evil watchful eye seem want go away movie drags tad bit expect setting limited budget much better primeval recent crocodile underwater predator thrillers tension heavy three leads give terrific performances truly chilling movie struck deep chord claustrophobic fear me apparently based true events