Did the Five Movements actually work?
The OA has some ridiculous and wonky plot details, but none has been as divisive as the Five Movements, a sequence of interpretive-dance maneuvers that Prairie teaches her five followers and claims facilitate interdimensional travel. Some viewers love them (e.g., there's already a Reddit thread of people talking about learning them), while many think they're silly as hell (e.g., Uproxx's Alan Sepinwall compared them to the choreography of "Werewolf Bar Mitzvah."). But the important question is: do they work?
The finale's big (and somewhat out-of-nowhere) school-shooting scene is frustratingly ambiguous about this point. As the music swells, we see the group perform the hiss-filled movements in the face of a violent gunman -- an act that proves they have a surprising amount of faith in Prairie's story. This selfless act ends up thwarting the gunman, but it's unclear whether the shooter is halted by the dance's mystical powers or if he's just stunned by the bizarre response to a dude pointing a semiautomatic weapon in the direction of dozens of defenseless people.
Of course, when the bedazzled shooter is tackled by the cafeteria worker, the gun goes off and Prairie takes a bullet to the chest, which indicates that the movements might not have been as effective as they seemed. Or is getting shot part of Prairie's plan, so that she might be reunited with Homer? It's unclear and there are no definitive conclusions offered by the show itself. It's almost like it's designed to be ambiguous! Crazy, right?