The scene itself is that superman smiles and enjoys the intimate saving of a girl, if it ended there, then the same old superman stuff would have been met and Snyder would be considered competent in this regard in 'getting the character'. It happened, it only then went further, and adds an 'interesting' dynamic to the material. Superman is faced with this own father's early premonition of the world changing, beliefs in god and our place in the universe shook, this is certainly worrying as masses are shown to worship him as they would Jesus. The scene conveys both diegetically and un with the voice over, the consequences to both superman's heroic action and his god like interference, the main theme of the story. This is what his turning worrying 'dis-interested' look is pertaining to. It goes beyond the simplistic simply saving people and then big smile and hands on hips and 'flying is still the safest way to travel..'