That's the human condition in a nutshell.
Birdman is a breathless, hectic, mad, mad movie. As you probably know, the bulk of it- apart from a short prologue and epilogue- proceeds without any visible cuts. We sink, we rise, we swoop we soar, we are eternally charging down corridors to get from scene to scene. Occasionally time speeds up. We leave the theatre to plunge through Times Square, we go back in again. We transition from plane to plane of reality. It could feel like too, too much but, thankfully, it's also very funny. Michael Keaton gives the performance of a lifetime as a not particularly likeable version of himself and Ed Norton is tremendous as a method-acting scumbag.