Unbelievably, Superman has demonstrated the ability to shapeshift by manipulating the muscles in his face to such a degree that he looks like a completely different being - in the examples show, he turns into a yellow alien-looking creature who also resembles Batman somewhat. This is remarkable and ridiculous for a number of reasons; the first being that, if he can do this, why doesn't he make his Clark Kent persona look like someone completely different? The second being that he's meant to be the Man of Steel - his skin is supposed to be rock hard. How can he be so malleable? The final reason - how did he manage to get rid of his hair and clothes in the transformation?! Genuinely stupid.
