I think in most of the movies I hav seen, only the Characters are introduced in Act one,with minimum info about the Chars. Can anyone give an exaple of a movie in which : in Act one the Character's back story is revealed.

Exposition in 3rd Act: I think 'Orphan' is an example. I like this way of revealing Ester's past. Is there an issue with "Exposition is Death" for this type of movie?

Can anyone give an example for a 'Bad Exposition' from any film?

---"Can anyone give an exaple of a movie in which : in Act one the Character's back story is revealed."

Unforgiven tells us straight up that William Munny was a cold-blooded killer, 100% through dialogue.

I think exposition is fine, under one condition: I have to want to know what you're telling me.

It absolutely must be built-up. It takes a solid 45 minutes until we learn what in the blue hell is going on in The Terminator, and by then, we are beyond curious. We HAVE to know.

Don't tell me something because I need to know, tell me because I WANT to know.

@Tagore3d: It's A Wonderful Life, Citizen Kane, The Wizard of Oz, Star Wars: A New Hope, Mr. Smith Goes to Washington, Snow White and the Seven Dwarves, The Deer Hunter, Tootsie, Rocky, The Shawshank Redemption, Butch Cassidy and the Sundance Kid, The Silence of the Lambs, Forrest Gump, The Apartment, The Sixth Sense, Toy Story, Up...

Those are just off the top of my head, each to a greater or lesser degree convey who the lead characters are as well as their backstory in Act One.

Would the first Bourne movie be an example of backstory in the third act? The entire movie leads up to the backstory. It keeps you wondering, where did this guy come from? What is his past?

Eyes full of surprise and of course .. love .. and confusion and total lack of not knowing how to react .. and so she was all he moves is unwilling or unable to answer a call for tenders and the mode of love to his youngest son .. it's like all his love and compassion and pity and easy going spirit .. was placed in the tomb with his eldest son, Buck .. Powerful stuff
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Another great example of crucial back story info withheld and then revealed late, at the climax, to great effect is 3:10 TO YUMA, when the protagonist, Dan Evans, the Christian Bale character, tells Russell Crowe's Ben Wade what really happened back in the war...