I've done it a few times while on the online-training stage, and on accident in actual matches...but there's a way to cancel the ledge snap and do a wall cling instead. Does anyone know how to do this? While on the training stage, I did my second jump and held down and toward the ledge while facing away, but only pulled it off a few times. I wonder if you can up B into a wall cling next to the ledge to cancel gimping attempts.