Iruka-sensei stared at Mizuki, who was lying in the foetal position snivelling, "No more... please, no more..."
"What the heck happened, Naruto?!"
"He tried to throw his giant shuriken thing at me, but forgot to let go," Naruto said matter-of-factly. "After he got over the pain of stabbing himself with all the corners, he had a nervous breakdown over what a miserable failure of a ninja he was. That made him collapse on top of the shuriken, which is how he got all those other injuries."
"Uh-huh," Iruka-sensei said. "And what really happened?"
"Fine," Naruto pouted. "I outsmarted him and took him out with an A-rank forbidden technique I'd learned from the scroll in the couple of hours before he turned up."
Iruka-sensei stared fixedly at Naruto for several seconds.
"Nervous breakdown over being a miserable failure of a ninja. Got it."