I've never walked out of a theater before the end of a movie, but this is the first movie to ever make me seriously consider doing so. A very long movie about nothing at all that I can discern, except maybe a man's unsettling relationship with his mommy.
If you must watch this, do yourself a favor and skip the theater. That way you don't have to trip trying to find your way out. Better yet, don't watch it at all.