Board Thread:Theories and Speculation/@comment-25093611-20160304230401/@comment-734582-20160310125726

ShishiHeiwa wrote: In Naruto all things are possible. When Madara turned into a female, this was shown. Walking on Air is less difficult then that. I'm sorry, but this is bullshit. Secondly, Madara didn't turn female. After Kaguya was sealed his body was extracted. It's little more than being a Jinchuriki overwhelmed by it's beast, except that in this case "beast" is substituted by Kaguya. She's an entirely different entity.

GreatestSin wrote: wouldnt it simply mean that a lot more chakra is required but it is still possible? I actually looked up the explanation for Water Walking, and it seems to use a different principle from what i actually thought.

According to Naruto 90, page 11, the user simply expels chakra to produce thrust. They don't actually really walk on water, it would be more like a hovering thing. So, returning to what i said earlier, i think it can be done via this way (it's essentially how a rocket works). Because air is about a thousand times less dense, and because of kinetics, you'd need about a thousand times more thrust (and thus chakra) if not more. It's basically highly inefficient to do, but i guess a ninja could use this technique to adjust their trajectory through the air.

Lastly, this is essentially the principle for how jetpacks would work, and since we don't have those, you can see just about how difficult it is.

So long answer short: contrary to what i earlier said, it would actually work on air, although it's not really "walking", it's more like Iron Man-style flight and it would cost more than a thousand times as much chakra.