Putting myself out there for extreme hate/criticism so I'l use this disclaimer; I know its awkward looking, I know its not that hard, and I know I'm not the first to do it.
That being said, does it have a name? Sliding on front foot with back ski tail pressed up underneath the box)
Im pretty sure thats not a gypsy killer. If i remember correctly, when andy did it, it was front ski's tail under the box and it made him spin out. In your picture i think its the back foot and you just ride all the way down like that?