Superman Convenient powers

The original Superman movie has often been held up as an example of how to do a comic book movie right. It s a truly brilliant depiction of Superman on screen, but one thing has always bothered me about it. That stupid ending. So despite it never being mentioned at all, Superman suddenly knows he has the ability to fly round the Earth really fast and turn back time? See my earlier Harry Potter entry for how that might have been a convenient power to re use. Then in the almost as good sequel, he s at it again with his magical amnesia kiss to take away the knowledge that Clark Kent is Superman. What are these powers, his special party tricks?