Maybe it's just my childhood memeory but this is one of the scariest episodes I have ever watched. In fact, it's one of the scariest things I have watched in my entire life. I was too young when I first saw it and it was well around midnight one night when I first saw the episode. Those circumstances aside, I was terrified by it once again when I finally got up the courage to watch it a second time years later. This episode teaches a very scary but valuable lesson about gambling addiction in a way that is very likely to stick with the viewer. This may very well be the reason I don't gamble!
Franklin's addiction starts slowly, gradually. You can see the transformation throughout the episode until it is a full blown addiction. Wheather the machine was really after him or if it was just a hallucination, this episode teaches that addiction will ultimately be one's end.