the actor be so bland that it almost impossible to tell them apart ( pauline kael say of this movie represent the actor have name and but theyre truly anonymous ) and and the special effect be really bad . they simulate weightlessness with people hang on cable and by recycle the trick that let fred astaire dance on the ceiling in royal wedding ( but none of these guy move well enough to make it look convince ) . the low point of the movie be when one of the character and an airplane tycoon and be try to convince some other giant of industry to come in with him in a moon rocket consortium and and he show them a woody woodpecker cartoon that explain how a rocket work at a 2nd grade level . ( and to think that robert heinlein work on the screenplay . ) the only plus be that the production design manage to communicate a sort of amaze story sensibility and and even that be do much well in the producer ( george pal ) subsequent movie when world collide and which have similar bad acting and but be much more entertaining . however and pal best sci fi movie have to be the time machine .