New Zealander Patrick Gillies’ “Offensive Behaviour” (2004, Rated R) isn’t stellar either, and feels far longer than its 78 minutes, but given that it was made on an $8,000 budget, it’s entirely forgivable.

In the vein of “Braindead”-era and fellow New Zealander Peter Jackson (yes, the same), it’s a trashy story of a filmmaker who decides to film a skin flick starring his harpy girlfriend and porn-obsessed roommate, and a bickering couple downstairs who stumble upon a pills-and-booze-swallowing man with a price on his head (about NZ $500,000, or roughly 13 American dollars).

It sounds like too many threads because it is. What redemption exists in “Offensive Behaviour” is the third plot, the assassins — a nun as hard as a flask of Heaven Hill gin and her prinking hairdresser son Nigel, (the wonderful David Sheard). Not since Robin Williams tried to teach Nathan Lane to walk like John Wayne in “The Birdcage” has someone been so zestfully inept at aggression. Sheard trying to sneer “You wanna piece of me?” is far more entertaining than Steve Martin’s quickly dull “hamburger” mispronunciation in “The Pink Panther.”

In no conceivable universe would “Offensive Behaviour” signal a renaissance for distributor Troma Entertainment (rumors of whose death have been greatly exaggerated) but that’s not the point. Freaking out squares with fake blood and cheap laughs is a noble pursuit, especially in these funereal times. And whatever you think about an oeuvre like Troma’s, which includes “Killer Nerd” and “Surf Nazis Must Die,” you have to admit that the world would be much less interesting without them.