One of the better edits of the season, with a NEW DOUBLE?!?!

I'm usually not a big fan of GoPro edits, but I can make an exception for this one. Easily one of the best amateur edits I've seen this winter. Hands down the best top to bottom continuous shots i've seen in an edit since Casabon's black and white edit. Plus that double just blew my mind. Never seen anything like it. Can anyone help me out on what the rotations involved might be? I'm not good at picking apart spins