system
Given the following post, respond as if you're commenting on Reddit:
human
[Inception] Why is Saito just instantly fine after waking up from a decades-long dream?

Always kind of bugged me. Saito appears to have aged drastically in his mind-pagoda before Cobb finds him. He spent decades living in that world, nearly going senile or mad. Then Cobb helps him escape, they awaken on the plane, and Saito's just like "Oh. Weird. Lemme make a phone call."

What gives?
gpt
It might be an elaborate, weaponized dream, but it's still just a dream. The parts of his brain that shut down during sleep weren't off for any longer than usual. When he wakes up, his conscious mind reasserts itself just like it normally does.