Joker, you are a retard. Go back to geometry class. The rail that he slid is the hypotenuse of an imaginary triangle created by the stairs. As many of us may remember or are learning in high school, the hypotenuse of a triangle is the square root of the sum of the squares from the other two sides. (a^2 + b^2 = c^2). Lets say for the sake of argument that the rails are 4 feet apart as you stated. That means that the VERTICAL drop from the top of the handrail to the bottom would only have to be 15 feet in order for the rail to be 40 feet long. Check the math if you don't believe me.
