There was an episode of Bewitched when Darren ends up having to buy a garage door opener (he didn't want to spend the money) because Samantha was using witchcraft to open the door and Mrs. Kravitz saw it, so he had to have an un-witchcraft explanation.
Oxy, with our garage door opener there was a rope that had a knob on it that would pull that disconnected the "trolley" from the chain, so that you could pull up the garage door. We don't have an opener anymore because ours was unsafe (it crushed a roll of paper towels). So far, none of us has really missed it, but we can't get a car in the garage anyway!