This video shows the stunning slack lining walk by Nathan Paulin who traverses 403 on a slack line rope between two cliffs. The stunning background and the risky performance keeps us almost at the edge of the chair. Slack line walking is very dangerous and requires quite an amount of skill and courage to perform. There are several factors that can go against such as wind, slack line tension, unforeseen bird or other disturbance, etc. Nathan Paulin covers 403 meters and perhaps is forced to lose balance by wind. The way he clung to the rope after that 403 meters makes us shudder. Nathan Paulin, however, has created a world record.