Revealing mistake: The guns that the soldiers use to kill piranhas with are actually Nerf Longshots that you can buy at the toy store.
Mega Piranha (2010)
1 revealing mistake
Directed by: Eric Forsberg
Starring: David Labiosa, Tiffany, Barry Williams, Paul Logan
Continuity mistake: During the car chase between Fitch and Diaz, Diaz's truck changes from a Suburban, to an Explorer, to an XL-7.