Narrative/fiction movies with unexpected elements of "reality" or fourth wall breaking or other interesting metaness? Illustrative examples inside (without spoilers): Sling Blade, Bamboozled, Shortbus, Timecode, South Park, etc.
I'm less interested here in pervasively-meta movies (like Adaptation or Being John Malkovich) and more interested in traditional narrative movies that have unexpected real/meta moments or elements. Some examples, of various kinds:
A) UNUSUALLY EXPLICIT INVOLVEMENT OF THE VIEWER
• in Sling Blade: Billy Bob Thornton's long look into the camera during his walk around town (which he's called a purposeful fourth wall break, meant to remind the viewer he's spinning a tale).
• in Bamboozled: the real reactions of shock and confusion we see from the studio audience during the filming of the TV pilot (apparently the extras playing the audience were told they'd be filmed as a studio audience, but were not told what they'd see onstage), which adds an interesting element to the end viewer's own reactions/shock.
B) REAL ACTS WHERE SUCH ACTS ARE USUALLY SIMULATED
• in Shortbus, Bound, Brown Bunny, Baise Moi and others: unsimulated sex, either obvious onscreen or reported by the actors involved.
[• all the movies in my actors who play their own instruments
[• all movies in which actors do either stunts or other acts you'd expect to see done by doubles (this is less interesting to me unless something about the situation overlaps other categories like A or C).]
C) INTERESTING SELF-REFERENCE
• in Timecode: film director character proposes shooting a movie using the multiscreen technique used to shoot Timecode, and other characters think this idea is pretentious.
• in South Park: four-letter words discovered to have direct, life-saving utility (movie is based on a show often criticized for "gratuitous"/useless explicit language).
• in Full Frontal: a few meta-twists for the standard "movie in a movie" idea (such as the scene from The Limey that fits into one of Full Frontal's existing scenes without any change of nesting level).
• in Dancer in the Dark, Lost in Translation and others: especially self-referential casting (famously childlike-whimsical-fanciful musician as character with same qualities; iconic aging actor as iconic aging actor; etc.).
... So which other examples should I check out? Please let me know why if possible, BUT PLEASE NO SPOILERS (no revealing plot developments/surprises). Thanks for your help!