Wall-Clipping is a method used mostly in speedruns (and by some casual players on Crushing difficulty) of Uncharted: Drake's Fortune (and one used in speedruns of Uncharted 2: Among Thieves). There are two wall-clipping methods. The old method was to crouch down behind cover and move the analogue stick used for movement left and right in a rhythm, clipping to the right of a wall/object and the newer method is done by spamming L1 or L2 and moving South-West (if Nate was facing North), clipping through almost any vertical surface.