I don't understand why it's so hard for people to give Naruto credit for that move. It's not like he used his hands alone to bend the raikage's arm, he used a high level ninja technique. The technique didn't rip through the raikage, it didn't do any damage to him at all, but it did cause his arm to move. That seems perfectly plausible, specially as a reminder that the rasengan is still an impressive technique.