I'm sorry, but marginal improvements in running times or jump distances or even weight lifted does not suggest to me that anything is possible. What it suggests to me is that despite all the media and songs and hype about anything is possible, no human has successfully demonstrated being able to fly, walk on water, levitate, etc.
If you think what I'm asking has no real relevance, consider how eco friendly being able to fly would be. We would have no use for cars and other pollutant emitters. In any case, I think you'll agree that athletes are not the best examples of "anything is possible," especially seeing as the further out these WRs get, the harder it is to break them, which is entirely consistent with human limitations. I want to see something superhuman, damn it!