This is really handy if you are all ready ghost glitching and you want to drop down on to something from a sitting position.
Ok when you stop ghost walking you will just sit down in mid air to drop down on to the floor or object then press Circle and start at the same time followed by X X you can also press up on d pad and start at the same time with X X do this really fast you will find yourself inside the wardrobe just exit that and you will fall to the ground really hand to reach hard to get to places

http://www.youtube.com/watch?v=ew0aH...7E9C1CFD569FBA