The upside down effect and the noise of the machine were absolutely nauseating which made this a hard episode to watch. Not to mention the invention made no sense at all. Compared to this I think I'd rather watch the episode with all the stolen bent knives, or the one with Chuck Connors and the mule. When the audio and visuals are both assaulting your senses, and the story is absurd, there is nothing else left but to ask "why did they do this?" This was probably the epitome of the show going downhill. It was 100% a kid's show by this point. Ah, what's the use in criticizing these later episodes - they too were made 50 years ago... how dare I nitpick? Well I'd like to go back in time and have some better episodes than these, that's all. They did not do justice to the great talent and charisma of George Reeves. He deserved better scripts than this.