It's something with the dust. That much is likely clear. What is in the dust is still to be determined, and since it is not Kryptonite, the K-flu seems to be the best option left. Either that or Sue will introduce an entirely new substance which can rob Clark of his powers. Now what I'm wondering is, is he lying on the ground because he is weak from the kick Tony gave him, or is he there because of whatever is affecting him? What I mean is, does this unknown merely remove his powers, or does it also leave him feeling weak and sick like kryptonite does.

I think, therefore, I get bananas.

When in doubt, think about time travel conundrums. You'll confuse yourself so you can forget what you were in doubt about.

What's the difference between ignorance, apathy, and ambivalence?
I don't know and I don't care one way or the other.