As she climbs up on the railing, you quicken the pace of your stroking again. You have a perfect view up her skirt, and you find yourself stroking as fast as you can... out of all the girls you have watched, this is by far the best you've ever experienced. It's almost as though she is interacting with you, it's almost too good to be true.
(Stroke as long as you like, when you reach the edge, hold it and continue)