Ok. The Ghost Jump. I've gotten it to work for me about 4 out of 300+ tries. Not very good odds. I can't recall exactly what i did to get it to work. Do you want to be standing further back or closer to the corner, when you begin your first jump? Does what weapon you have in your hand matter? Also, do you continue to hold forward on your left analog stick and stay crouched when you hit the corner to begin your second jump?