Board Thread:Boruto: Naruto the Movie/@comment-26010916-20150806143152/@comment-4036559-20150811183515

Actionmanrandell wrote: I believe that she has been secretly practicing it i don't believe that was her first use of it.

notice how she states LOCK ON this implies it was a technique she had used before maybe she got a hold of some gentle fist scroll after awakening it

mind you there is no proof that this was her first time ever using the byakugan I think this is her first time using the Byakugan. like GoldLiger Naruto and Boruto doesn't know about this. same goes for Hinata.