Team 7

Naruto Uzumaki, Sasuke Uchiha, Sakura Haruno, and their sensei Kakashi Hatake were primarily doing menial D-rank tasks (like finding lost pets or weeding gardens). Growing frustrated, Naruto complained to the Third Hokage, who granted them a C-rank mission to escort Tazuna back to the Land of Waves.

Now the group was in quite a predicament. They had found out, soon after leaving the village, that this mission was not in fact a C-ranked. Rogue ninja had attacked, and although Kakashi had defeated them easily enough it only solidified the fact that this mission may be more than they could handle.

Soon after they were under attack by a much fiercer opponent, Zabuza Momochi, the demon hidden in the mist. The fight between Zabuza and Kakashi was devastating, with no clear victor, the fight went on until both men were nearly out of chakra. Thats when Zabuza was killed, or so team 7 was lead to believe, by a tracker ninja whos goal was to dispose of Zabuza to protect the Hidden Mist village secrets.

Kakashi lost consciousness soon after, chakra depletion and loss of adrenaline wearing on his body. Now, as the rested in Tazuna's home, Kakashi finally awakened he revealed the truth. That tracker ninja was not who they claimed to be and Zabuza was indeed alive, and woukd come back to finish the job. So Kakashi, on crutches and still weak, took his team out to the forest to train, he was teaching a simple exercise: Tree walking, a fundamental chakra control exercise where a ninja focuses a precise stream of chakra to the soles of their feet to walk up vertical surfaces. It is a foundational skill taught to Genin and requires extreme precision: too little chakra causes you to fall, and too much shatters the tree.