this be just about one of the dumb thing i have ever see . maybe not a bad movie ever contender and but if you haven not see that many bad one and this could easily make your top ten bad list . when you consider what be achieve in 1933 with the original king kong and you have get to ask yourself why anyone would stoop so low a to produce this debacle . then and take it one step far and realize that the quantum leap to star war the following year achieve a new level in sci fi entertainment and this offering will make you laugh and cry at the same time . now let me ask you and what would possess the professor ( peter cushing ) to bring along an umbrella a a prime piece of subterranean research equipment for the ride to the earth core . ok and so it be useful in fend off the parrot or tyrannosaur ( parrotosaurus . ) in the early go and but come on . somehow i do not think this be what edgar rice burrough have in mind when he write his tale of pellucidar . he probably do not have caroline munro in mind either a princess dia and probably the only redeeming factor to this whole escapade . at least there be one bit of pseudo scientific explanation that i get a kick out of while i be always look for one in film like this . that would have to be how the sky at the earth core be really the underside of the earth crust and explain that ethereal pinkish glow . but try a it might and the story just couldn not hook me in a way to find anything at all interest about hoojah the sly one or jubal the ugly one and much less those goofy half man and half pterodactyl creature . to paraphrase the good professor you can not mesmerize me and i be pay attention .