@Dan310 you’re right. The only hard cut in the film comes after he shoots himself on stage. It’s clear to me what that means–when it comes to magical realism, there is a truth that grounds the fantasy. But regardless of the interpretation, the truth stands:
Riggan killed himself.
Whether he did it on stage (as the one-hard cut would suggest) or whether he did it flinging himself out the hospital window, he finally did it.
Which means he finally gave people the “blood and action” Birdman called for.
In post #81 you argue for Steadfast:
the entire film he tries to suppress Birdman because Birdman threatens his credibility as an artist. He’s meditating in the beginning to shut out Birdman’s voice (according to an earlier draft of the script), he destroys the poster, and perhaps in a bit of an homage to Fight Club he attempts to shoot himself to end the alter ego for good.
But that’s not why he shoots himself.
Prior to his last moment on stage he tells his wife that he hears voices in his head, but that while he finds them scary, he now thinks of them as “comforting.” This is in sharp contrast to the Riggan at the beginning of the film who indeed, was meditating to shut the voices out. He wanted nothing to do with them. Now he finds them soothing. His wife even comments that he seems abnormally “calm”.
Riggan has accepted his Birdman persona and proves this by giving everyone the “blood and action” they expect.
“I am you.” And Riggan responds by believing he is Birdman.
He tried to commit suicide twice–once when he walked into the ocean, and twice when he walked onto that stage with a loaded gun. Both times he escaped. Nothing happened to him (as far as he knows) and now he feels invincible. Now he feels like Birdman … only he’s not invincible.