Thanks Jonah, Great details. I've managed to land a few pretzels by thinking about doing just slightly more than a 180 onto the rail, and forcing the spin with my shoulders but my success rate was garbage. I'd nail it once every thirty tries.
It's really obvious in the clip how you are putting pressure on your down hill edge and using that to initiate the reverse spin. Can't wait to try this again, I haven't landed one in years.