Rambo is, as Peterson mentioned, the steepest tree-cut inbounds run in North America, specifically located in Crested Butte. From the top, you can see the bottom beneath the trail before you can see the trail in its entirety (in other words, it's steep). 55-degrees steep.
Mogul skiers traditionally try to do a zipper line down the hill, keeping their upper body in a straight line with the fall line, and moving their skis in small, arcing turns to get a rhythm going, but Alex does his own thing entirely.