I look at it like this as jamt mentioned in another thread. Hammer flies tangent to curve not directly out.
Reducing pressure is like lengthening the wire on the hammer ball. Or just lengthening your radius. I think. Pressure and standing height might complicate things beyond this?
wtf? Using the build up of angular velocity and releasing it to achieve an amount of linear velocity or kinetic energy. Maybe NASA should to this to save fuel when they send out space ships.....
ok, kidding aside. it is pretty hard to figure out how much angular speed is increase or reduce due to external forces. However as a minimum, proper timing of the COM can mean the difference in the skis jetting off the the bump. Here's Fearing's second vid and its better b/c he talks in English. Starting 18:20, he doing that A&E drill on the rollers, in a later sequence he skip/hops over them and you can see the difference in how the COM moves.
The vid has a sequence following the A&E where he gives some pointers about throwing an extra turn by emphasizing that knee roll. Something I have been working on when I hit a mogul field that has flat troughs. When that happens, I can't rely on controlling speed by using absorption for the plain simple fact that the terrain doesn't give me any range to move my COM.