If this guy's calculations are correct, then you're worse than a goner if Superman punched you. We're not talking about Henry Cavill (although he does a pretty good job playing Clark Kent) but the actual fictitious Superman with his X-ray vision and insanely powerful punches.
If you can't be bothered to watch the four-minute-and-a-half clip, then here's something to summarize the whole thing for you:
"Superman wouldn't just knock the wind out of you. Oh no! He would knock the atoms out of you."
So if you're planning on hitting on Lois Lane, then I suggest you don't. He might not be everywhere, but do remember that he's got X-ray vision. And as we saw Brandon Routh in Superman Returns, he's not afraid to use it.