Tremors 3: Back to Perfection (2001)

First came the Graboids, then the Shriekers. Now, amid the theme park razzmatazz that has grown up around the town of Perfection, Nevada, come the Ass Blasters - giant critters that can both fly and detect targets by sensing body heat. Worm-waster Michael Gross is just one of the citizens returning to protect their burgh from the new generation of mutant man-eaters and director Brent Maddock slips in the old faces with almost parodic glee. Newcomers Shawn Christian and Susan Chuang also prove their mettle. But while this provides passable post-pub entertainment, it's a little over-familiar if you're sober.