When Kate the Game Warden is asked by Carl where she "learned to deal with sharks?" Kate's response was "Sharknado!", another science fiction/ cult favorite of the SyFy Channel.
Later, in the boat, Kate explains that to blow up the other dam they are going to shoot scuba tanks "kabloey". This is an obvious reference to the ending of 'Jaws', to which Carl says, "stupidest idea I ever heard."
During the rafting race Kate and Carl break into a shed. The lock is already broken, and as she enters the rifle is pointed down. Immediately after entering, the rifle is pointed up.