i actually own this movie which be the mst3k version call cave dweller which be really the only way anyone could really watch a movie like this . if it weren not for joel and crow and and tom servo constantly make wisecrack and it wouldn not be possible to sit through this piece of crap . you have a hero call ator who look a lot like jeff spigoli in fast time at ridgemont high and appear only slightly more intelligent and just without be stone . he take on caveman ( the cave dweller . ) invisible guy and a giant snake ( with a bunch of anal retentive snake that like to line up all the skull to face the same way ) and invent a hang glider which suspiciously look like a modern aluminum one with some cheap vine wrap around it and and then do battle with the evil john saxon look dude . then he rid off on his horse across the tire track where someone be four wheel . yes and i get most of that from mst3k and which a i say be the only way to watch this turkey of a movie . if it weren not for that and it would get zero star .