Spoilers: Wave Arc; Sasuke's "Death"...
Naruto was mad. No, he wasn't mad, he was way beyond mad. He was enraged, Naruto could feel his eyesight going red as he lost control of his emotions. 'Why did Sasuke have to die, he had so much to do. And why would he ask me to kill his brother?' He gasped as he felt power pulsing through his earlier tired body, he also felt the senbon popping out of his skin where they had, moments before, been stuck fast.
He felt a growl, deep and animalistic, claw at his throat, demanding to be free. Unknowingly he snarled in outrage lunging at the masked nin before him.