so i'm pretty sure this isn't really what you're talking about but i've done a type of handrag swap that can be seen in this video at 103 and a the next couple shots http://www.newschoolers.com/ns/content/viewvideo/id/374056/member_id/76821/ yay for self promotion
i would call what keiran does to be more of a "hand pretzel" because he basically uses his hands to direct his momentum instead of an edge.
i think what op is talking about is coming on left foot and pretzeling into a front up with only the hand down. i think its possible but you would need a really long up down and lots of speed for it to work
the date you joined doesn't give you a larger penis. -factorfactor