It sounds like your dog is worried about something in the hallway, but sort of forgets about it if something exciting distracts her such as going on a car ride or having guests or another dog. I would not pull her as when dogs are pulled we are forcing them to face their fears in a way that is not very productive, leading to her putting on the breaks more. I would instead try to find ways that she voluntarily walks by through positive associations. For instance, perhaps you can try talking to her in an exciting tone of voice as you drop high value treats by the area she is reluctant to walk. You can read about this strategy here: https://hubpages.com/dogs/Using-the-Jolly-Routine-... It is also helpful to troubleshoot what may be in that area that scared her to help reduce the fear. For example, maybe she slipped there and putting some mats to walk on can help or maybe there is some reflection or noise that can be buffered. Make sure to make being outdoors super rewarding and fun too so she can chain the hallway with the outdoors just like you like kids start acting happy when they catch a glimpse of the entrance to Disney World.