There’s a tremendous reveal in the middle of Tenet, the time-twisty thriller from revolutionary storyteller Christopher Nolan, where the audience learns that the man John David Washington’s character was fighting in a hallway at an earlier point of the movie… was John David Washington’s character.
Washington’s lead, known only as The Protagonist, is working his way back through the movie, and encounters himself from an earlier scene.
We watched that scene, but didn’t know who the man was fighting at the time.
Filming it, as it turns out, was even more crazy for all the people involved.