Thanks guys. A buddy of mine did underflips on snow and I've always wanted to learn them. Don't forget that this is only the first and second tries of this trick. I'm still pretty sure the second one is an underflip... I set the backflip, but i start spinning first, then the backflip momentum is shifted to a lincoln and then the last 90 is completed when I land. I was doing this as if I were skiing forward, not switch.
From what I was to understand, an underflip is 90-flip over uphill shoulder-90.