FanFiltration said:

I never went to see "Return of the Sith" in a theater, but when I got a home video copy I turned it off about ten minutes into it. Does that count? I have never seen the entire thing. As far as movies I've walked out on in theaters, there is "Son of the Pink Panther", Robin Hood: Men in Tights", and "Man of Steel".

I would say that counts. I don't blame you for shutting it off. I wish there would've been a power failure in the theatre when I saw it so it would've ended.