Board Thread:Episode Discussions/@comment-25319479-20170920093317/@comment-734582-20170925060448

Lorenzo.r.2nd wrote: if that was, then why didn't kakashi accidently add ration to his rasengan? We don't really know the "recipe" for lightnig and fire release. Also, Boruto didn't add it to a Rasengan: the jutsu he created can barely be considered one.

However, we do know that of wind release: Chakra grinding against itself. Well it turns out that if you have a ball of rapidly rotating chakra, you're gonna create areas where two pieces of chakra rotate against each other and so the condition for wind release is met.

Note that it seems Boruto misunderstood the instructions and added more order to the rotation to create these surfaces where chakra grinds against itself. But he also didn't make a full Rasengan, implying that in stead of Naruto's steps (Focus + Rotate, Power, stability, wind release) Boruto didn't complete the control and power steps(focus+rotate, wind release). Boruto creating small amounts of wind release would also explain why he cut the rubber ball without a full rasengan (since at this stage, Naruto made a full-size one, and Boruto didn't). In other words, Boruto's Vanishing Rasengan is still missing two steps.

In other words, Naruto's method of brute forcing wind release onto a rasengan sucks. Something i've wondered for a long time. A far more efficient method would be : Rotate, element, then increments of power+stability. Such a method would allow you to find a "stable" configuration which then has to become stronger and more focused. More element chakra, increase size and stability, increase element, then size and stability. To stick with the balloon analogy of the Rasengan: Naruto basically fills a balloon with air, then tries to add water to an already-inflated balloon. It's far easier to first add water (element) and then air (power/damage).