The character of Cole played by Eugene Byrd mentions a documentary crew who were also hunted by Anacondas which the other characters dismiss as a story, this is in fact a reference to the film 'Anaconda', the first film in the series which stars Jennifer Lopez and Ice Cube.
Dr. Ben Douglas: [the expedition is wading through a marsh - Ben starts humming the theme from "Jaws"]
Duuh, dum, duuh, dum. Dum dum dum dum dum dum...