When you tear it down or jump it off, then such dream manifests the desire to change things that are difficult to deal with, to change to things that are easier to manage. If we are inside the wall, then it means we are protected and isolated from external danger. If the wall plummets when we lean on it, then it indicates that we have little confidence in our protections. If the wall is ruined, then it reveals fear and grief.
Read more about dreaming of Wall in other dream meanings interpretations.