Saving the 'Oner': When Complex Blocking Crumbles, How Do You Adapt?

Hey fellow camera ops, Steadicam guy here. I’ve been mulling over something that keeps me up at night, especially with the increasingly ambitious single-take sequences we're seeing. I recently worked on a short where we had this incredibly intricate 'oner' planned with the ALEXA Mini, covering three rooms, two actor changes, and a practical light cue, think a mix of movement and subtle dialogue beats. We spent days rehearsing, but on the day, with the full crew, lights (SkyPanel X, M18s), and the pressure, little things started to unravel. A prop wasn't quite where it should be, an actor missed a mark by six inches, throwing off the focus puller (who was a genius with the Preston), and suddenly my foot hits a cable I swear wasn't there in rehearsal. It turns into a domino effect, and suddenly that beautiful, meticulously planned shot is a disaster. What's your process when a highly complex 'oner' or blocking sequence starts to completely fail on set, and how do you adapt to save the scene?