The dream is always the same. Somehow you end up high up somewhere, maybe a mountaintop, maybe a tall building or just a ledge that's a bit too high for comfort. Then the conditions change and you're no longer in control of the situation. You find yourself hanging off the edge of the building, stuck in an impassable crevasse, swinging from the ledge. Pretty soon you have no choice but to jump, or fall, but that's no choice at all. Just at the critical moment you regain consciousness and you start searching for the metaphor.