"Okay, now we start the tree-climbing jutsu," said Kakashi, trying to sound enthusiastic about this.
"What's so hard about that?" asked Sakura.
"You won't be using your hands," said Kakashi.
"Huh," said Naruto, thinking for a moment. His face shifted as he thought of something, then threw one hand forward.
CHUNK CHUNK CHUNK CHUNK CHUNK!
"Making a staircase of kunai to walk up is not the correct answer," said Kakashi as he eyed the result of Naruto's attempts. "I'll give you a point for creativity, but this is how you do it."
Kakashi walked up the side of the tree as if he were just walking across the floor of the room.
"Isn't that hard on your ankles?" asked Naruto.
"You'll just run up the side, doing it slowly is a bit harder," admitted Kakashi.