No need to recap the plot. Okay, the film's no classic. In fact, someone in production borrowed the bulldozer vs. monster from 1960's schlock comedy Dinosaurus. But, in my book, the 80-some minutes isn't bad enough to rate among the truly bad, e.g. Manos: The Hands of Fate {1966}. Catch the photography, which is pretty good (of course, post- production bungled day-for-night, but that's not photographer Gentry's fault). Then there're the lush colors, about as vivid as any I've seen. Add Cardella's sturdy performance as the take-charge sheriff, along with some pretty good stop-motion, and you've got genuine compensations that lift results from the truly bad.
Of course, the intended comic relief is pretty lame, along with a script that appears almost thrown together. But perhaps most disappointing is the utter lack of tension. Monsters should generate tension. However, director Stromberg fails to build suspense, which requires a better sense of structure than what's provided here. Instead, the production goes for quick shock, which itself doesn't work very well. All in all, the movie's too good to be truly bad, and too bad to be good. I like what another reviewer observed, namely the results look like they were made by erratically skilled amateurs.