One day, while flying above the Earth Kingdom riding flying bison Appa, Aang and his friends stood in a green meadow, which lay at the heart of a majestic forest. In the clearing there was a small, clear lake. The boys then decided to make camp in a clearing to rest until tomorrow.

While Katara collected water from the lake, using his domain, Aang decided to give her a hand, when the ground suddenly failed him from under his feet and falls into a hole slightly deeper. Fortunately, the bottom of the hole was made of a soft ground, and then the fall was not painful for Aang. - Quiet Aang! Now we will go back! - Katare said, trying to calm Aang. - Okay Katara! - Aang replied.

Then Aang saw something that glittered beneath him and began to dig at that point to find out what it was. - Whoa boys! Look what I found! - Aang exclaimed as he held in his hands the object that was found in the earth. It was a bright pearl, as large as an apple and the colors of the aurora borealis. Suddenly, the ball became increasingly bright and instantly disappeared in the hands of Aang. - What happened? - Sokka asked curiously. - Do not know, guys! - Aang said.

At one point, Aang began to feel a power growing within himself and both he and the others realized that he was getting bigger muscular, so that ended all his clothes torn to pieces, except a pair of shorts yellow material that resisted boldly to muscle growth. In the end, while others stood dumbfounded, Aang's growth will stop!