Talk:Amon/@comment-98.207.90.208-20120612005155/@comment-71.203.129.15-20120612014946

This is from the avatar page http://avatar.wikia.com/wiki/Avatar

it says he was fataly wounded not killed.

While Aang, or any other Avatar, is all but invincible in the Avatar State, having millions of bending experiences which can surpass an army of benders, there is one grave weakness - in effect, every Avatar, that is, the entity of the earth's spirit, is present in the physical world while the current Avatar is in the Avatar State. If the Avatar were to be killed while in the Avatar State, every Avatar would die with him. This would break the cycle permanently and the Avatar would cease to exist.

Aang was fatally wounded by a lightning strike from Azula while entering the Avatar State. As a result, his connection with the Avatar Spirit was jeopardized, resulting in the Avatar Spirit's fall from the plane of existence. Fortunately, Katara was able to use the Spirit Water she received from Pakku to heal Aang, reviving Aang and consequently the Avatar Spirit.[15] The strain of the revival caused Aang to slip into a coma for several weeks, and during that time, he managed to secure his connection to the Avatar State by meeting with the four Avatar incarnations before him.[8] However, it took longer for his connection to his past lives to be completely restored.

Another downside to the Avatar State is the considerable mental strain it can cause to less experienced Avatars. Prior to his tutelage under Guru Pathik, Aang would often leave the Avatar State feeling horrified at what he had done under its influence. Further use of the state, at least in extraordinary circumstances, can place such a large physical strain on an Avatar's body such that their life span can be affected; thus, Aang's one hundred-year time in the iceberg contributed greatly to his eventual death at sixty-six years of age biologically, and 166 years chronologically.[16]