Again, you are misunderstood. That is Tad Wallnuts you are speaking of. The OP is referring to a Mr. Tom Wallisch. While Tad Wallnuts has the ability to perform a number of highly advanced off-axis double spinning maneuvers, Tom Wallisch only has one of these in his bag of tricks. It is called a double kang. He takes flight off of an upslanting snow pile and then performs a liukang grab which is then released at which time he performs another liukang grab with the opposite hand and foot. He then proceeds to set his skis down upon the landing snow in the form of a so called "gangsta" thus "banging" away from his aerial maneuver. And now you know the difference. It's an easy mistake to make.