In the movie, it is stated that he threw the Rasengan and was able to make it vanish and reappear. Also while watching the movie, in one of his fights in the third match, he was in the form of the Hyuga's family Gentle Fist's way. At the point in the movie where he throws the Rasengan at the Hyuga's member, he had made it vanish to reappear and explode.

How is it possible at his age?