Silly, over the top seventies sci-fi featuring fire causing giant plants. Fun and thrilling, this is everything you'd hope for in this kind of thing. Along with featuring many sci-fi's tropes, there is a scene near the end where a couple of the heroes (the heroic group overall having a fun camaraderie fighting against the stiff upper lip of the time somewhat) where they frolic on a beach. Well, the worlds going to end soon they think, so why not?