Eighth gate of Gai


I know if you enter and use the eight gates formation that Guy Sensei used,
you will die. So I was wondering, is there a way you can use it and won't die?
Perhaps use it for a second or a really short time and get out? Or not even
use, just enter it for showing? And also how does one know he can use the last
gate?




> The 8th Gate, also known as **The Gate of Death (死門, Shimon)** , located at
> the heart, requires the user to stab their chest with their thumb to direct
> the chakra to the tenketsu. Once opened, the user will enter what's known as
> the [Eight Gates Released
> Formation](http://naruto.wikia.com/wiki/Eight_Gates_Released_Formation).
> Opening this gate will cause the user's blood to emanate a flaming aura of
> red steam, the so-called Steam of Blood (血の蒸気, Chi no Jōki) from all pores
> of their body, hair, and eyebrows. Releasing this gate uses up all of the
> body's energy while making the heart pump at maximum power. Exceeding the
> power of every other gate, the user is temporarily granted approximately a
> hundred times their normal power, far beyond that of the five Kage. Once
> activated, those who are capable can perform the [Evening
> Elephant](http://naruto.wikia.com/wiki/Evening_Elephant) and the [Night
> Guy](http://naruto.wikia.com/wiki/Night_Guy). The side effect of opening
> this gate is that it comes at the expense of the user's life, causing the
> user to crumble to ash after their chakra runs out, having virtually cooked
> themselves from the inside-out. This is unlike opening the other gates,
> which simply injure or damage the body.  
>  
> [(Source)](http://naruto.wikia.com/wiki/Eight_Gates)

  
I don't think you can live after using the Eighth Gate because the Jutsu user
has to thumb crush his heart and follow the blood from the user's heart
directly.

I think to open the Eighth Gate you have to limit the overall flow of chakra
within a person's body. The basis for the idea of the chakra gates comes from
the body's limits on the functions within it. This makes the body much weaker,
but it keeps the body from expiring too soon.

