An off-track door that's just a roller popped out, with the track and cable otherwise sound, is usually a shorter visit - realigning the track, checking the roller and hinge it came out of, and running the door through a full cycle to make sure it tracks straight before we leave. A door that's come off because the track itself bent, or because a cable frayed and let one side drop while the other stayed up, takes longer. That kind of asymmetric failure means we're not just fixing the symptom; we're checking the spring tension on both sides, the cable drums, and whether the opener's travel limits got thrown off by the door dropping unevenly. On a 1970s-built house here, we're also looking at whether the track was ever upgraded from the original gauge, because thinner original track bends easier and doesn't always take a clean realignment - sometimes it needs to be swapped rather than bent back.