I watched the film last night. I would add that the existential crisis through which Riggan passes reminded me that of Guido in 8 1/2 Fellini. An existential crisis experienced by a director during the assembly of a work that looks like it will not reach an end because of problems which show up successively, and in a stunning way. These two crises are separated by about half a century, during which important changes took place in the scenario where we live, the rhythm of our lives and in people's heads. Riggan's crisis takes place in a Broadway theatre in the XXI century, in the middle of hubbub which surrounds the Broadway atmosphere, while Guido's takes place close to an Italian thermal waters resort where his movie is being filmed. Riggan interacts with Birdman while Guido interacts with his memories of situations that have marked him, from his childhood in a college of catholic priests, until his directing career, passing through his father's longing with whom he could never communicate and various passions for women extremely attractive. Riggan wants desperately to be recognised as an author and an actor while Guido is concerned about putting together the several pieces of his life up to the present. In the end, Riggan turns into a creature which fly through the window of the hospital, while Guido put all the characters of his memories in a circus ring where they parade with the sound of the great music of Nino Rota.