While that lady is clearly nuts, I have to admit that personally on a single track road if a car is behind me, I'll move off the road and stop if I have to to let them by. Not to be courteous to them, but because even if they're patient it's not nice being followed and I want them to leave me in peace on my ride ASAP.
When I hear an impatient driver behind me, I only move out of the way if there is plenty of room. Impatient drivers are usually reluctant to crush you under their wheels but often happy to knock you sideways into the hedge/wall/pavement, which is a very likely result if there isn't much room.
While that lady is clearly nuts, I have to admit that personally on a single track road if a car is behind me, I'll move off the road and stop if I have to to let them by. Not to be courteous to them, but because even if they're patient it's not nice being followed and I want them to leave me in peace on my ride ASAP.