Ooooo! Ooooo! I just remembered the worst one I've ever read! Rather than admit that the Galactic Empire has medical technology more advanced than the Federation when presented with the fact that, when being electrocuted by the Emperor, one can clearly see metal vertebrae in Darth Vader's skeleton (demonstrating the ability to repair the central nervous system, something that Federation medical technology is canonically unable to reliably do), Robert Scott Anderson, aka Darkstar, aka Guardian2000 postulated that humans in Star Wars naturally have metal bones.