When exactly did Jim Carrey figure out we were ALL in a Truman Show?

because his psychological break from the fake looks a lot like mine when I realized that we're all going to die alone, in our very own bespoke sensory deprecating hypernormalised synthesis of two previous existences that were also not reality.
And I'm sure all 4 of you that read this can relate with your own private Idahoan flashback of when you felt your delusion of the American dream chopped down by a over zealous federal bullet.