Deliberate Flaw Retcon: This article argues that the film is actually a work of genius, the "flaws" being deliberately worked in to subvert the tropes of the B-Movie horror genre.
Hey, It's That Guy!: The Jeep driver who crashes said Jeep into a tree under the influence of the neurotoxins and is launched through the windshield is Dante Hicks in Clerks. (Poor guy. He wasn't even supposed to be there that day).