8. The More Mr. Fantastic Stretches, The Weaker He Should Get
Think about each time Mr. Fantastic is shown to stretch on screen. There's something not quite right about the effect, isn't there? And here's why the effect looks silly: impossibly, his limbs retain the same thickness no matter how elongated they become. For example, as his arms stretch out, his wrists, forearms, elbows, etc. are just as thick as they are at their normal length. But that shouldn't happen. As his body part stretches, it should naturally become thinner. After all, his mass isn't magically increasing. When the limbs are shown to be longer without being any thinner, the visual just appears wrong to the audience. Also, consider what would really happen to his muscles as his limbs get longer. The longer he extends a limb, the weaker it should get - the muscles are operating over more and more distance. At a certain point the muscles would become so weak, the limb wouldn't be usable any more. Also, the bones would be so thinned out, they'd likely shatter. And don't even try to work out what's happening to Reed's skeleton or internal organs when he becomes different shapes.