He didn't reverse the rotation of the earth...
Okay, I admit that there are at least a few aspects of the powers of Superman and the Kryptonian super-villains in these movies I never knew existed in the mythos. And I admit some of them were just plain weird. General Zod suspending someone in the air with some sort of force beam - and Superman's giant super-cellophane peel-n-toss 'S' anyone?
But I really don't understand the confusion over the ending of this first movie - when people ask how Superman was able to a) cause the earth to reverse its rotation; and b) subsequently reverse time.
The answer is that he didn't do either. He simply flew faster than the speed of light - and thus went back in time himself - in accordance with Einstein's Theory of Relativity. And the earth didn't reverse its rotation - it simply served as a sort of giant clock as both Supes and the audience went back in time. If you went back in time, you would see people walking backward, planes taking off backwards, rain falling up - and the earth itself rotate in reverse if you could go out far enough into space.
Of course, there are still more than a few practical problems with this - such as objects reach infinite mass as they approach the speed of light, objects simply can't go faster than the speed of light, etc. But still - he didn't reverse the earth's rotation; he just personally flew back in time.
Now for the real mystery - why did it take both him and Batman 50+ years to figure out underwear IS WORN ON THE INSIDE????