For those wondering what happens when someone gets up to leave...
Depending on when it occurs is a major player one if you have to rewatch a scene. The theater rotates every 4 mins or so. When someone opens the doors to leave outside of the load and unload area, it sets off an alarm on the operator console. To clear the alarm and reset is actually easy, but for safety the procedure is complex. To ensure the building is safe to rotate again, a Cast Member has to lock out the ride from someone resetting it and literally run a lap around the building to find the person who exited. It it is clear, then they return and unlock the ride. After that, they can finally reset it.
As you can imagine, depending when the person gets up to leave during that 4 mins the theater is parked determines how much time a cast member has to respond and clear it. Literally running is also not safe so a brisk walk is all they can do. So that's why you watch the same scene over again.
Now that often triggers another person to get up because they aren't patient to sit through it again or they leave to tell a cast member the theater didn't rotate...which means the cast member has to do it all over again leading to another repeat. It's definitely a problem.
