Not just his ability to fly, but his ability to *hover*. I always wondered how he managed that. Krypton has higher gravity than Earth, we all know that. So Superman's ability to fly, as such, is understandable. But he shouldn't just be able to hover off the ground like that - he's not weightless
, just lighter and stronger. Did they ever explain this?
(IIRC, the Earth-2 Superman originally could not fly, just literally leap tall buildings in a single bound, so to speak. He couldn't hover or fly, but eventually learned how to do both of those things.)