Mark is both a history and English teacher! For us, at least. I don't know why, I didn't knew the correct meaning of this title, but my first thought was that it could be about the big mud slide here two years ago. It probably wasn't even known outside Norway, but I heard a stories and thought "Mark could write songs about this". The slide took several houses, and a woman woke up in her bed and soon found herself sliding across mud, in freezing snow, still sitting on her mattress. Taking about nightmare; waking up and realize that the walls REALLY are disappearing in front of your eyes.
Whatever the song really is about, it almost certainly has something I can learn from it.