Finally, one of the newest and still probably the least widely understood use of the vanish allows you do things like corks and gainers without changing your momentum line or target, from landings on the typical swingthrough leg, such as hypers. These vanish corks and gainers are not unique and different tricks, they are regular corks and gainers performed from a vanish transition. The in-air trick is identical to their more common swingthrough counterparts, but only the last half of the swing is utilized on the ground. The term “boneless” is being used increasingly to describe this type of vanish cork. Just as “frontswing” describes a type of swingthrough, among others, “boneless” describes a specific type of cork or vanish, but is not itself an actual transition. A common example would be from a cartwheel. As you land your cartwheel on your swing leg then base leg, you want to be facing backward. Simply lean back and lift the swing leg, then jump and pull the cork or gainer. The difference here between a cork and btwist, or gainerflash and aerial, is the orientation upon takeoff. It is very important to takeoff facing away from the momentum as much as possible to really accentuate the backward takeoff and avoid ambiguity. Allowing yourself to turn toward the side or front during the transition will usually still give you what feels like a cork or gainer, but will often be visually mistaken for a btwist or aerial. In the above video, focus on the orientation of the chest, or the general momentum of the upper body upon takeoff. Notice that the chest is more or less backward for the corks, and forward during btwists. This subtle difference is the key feature in defining a btwist from a cork in this way.