the clashing rasengan and chidori reminds me of trigun. I don't like spoiling good animes like trigun, so I hope all I've said is just enough and not overboard.
anyway, I guess I can't tell if Naruto meant to only scratch the forehead. But I think it's touching if that's what purposely went through Naruto's mind the most rather than just a blind bloodlust and denial of Sasuke's freshly carved path.