Your physical mastery grants you an impossible stride.
Benefit: As a move action, you can move up to half your slow fall distance (maximum 50 feet) across a wall or ceiling or across ropes, branches, or even water or other surfaces that cannot support your weight. You must reach a solid, level surface by the end of your turn or you will fall.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.