Michael Keaton soars again in first "Birdman" teaser

There's nothing quite like grown men running around in their underwear. Sure, we're used to Will Ferrell doing it in practically every movie he's in, but there's something a little bit more to it when the likes of Michael Keaton and Edward Norton are wrestling in their skivvies to expose their character's vulnerabilities. Watch the teaser trailer for "Birdman" and be amused -- and amazed...

In "Birdman," or "The Unexpected Virtue of Ignorance," art imitates life as Michael Keaton takes on his former Batman persona, playing a washed-up, former big-screen star who used to dominate the box office as his "Dark Knight"-styled alter-ego, the iconic Birdman.

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Looking to jump-start his career in the final act, he struggles to mount a Broadway play and finds his own ego to be his biggest obstacle. Can he finally step out of the shadow of the character that vaulted his career -- and crashed it?

Also starring Emma Stone, Amy Ryan, Naomi Watts, Andrea Riseborough, Zach Galifianakis and Edward Norton, the surreal and entertaining examination of a fallen actor's fragile psyche is directed by Alejandro G. Inarritu ("Babel," "21 Grams").