Some footage that I forgot I had from the this past fall. We got to the top of the hill and the winds had switched 180 degrees. As you can see we have to run like hell to get off the ground. This is one of the reasons the manufacturers recommend only launching these wings with skis on :-P The air was also "sinking", after I took off I almost crash landed twice because I got too close to the ground in the burble as the wind was wrapping over the top of the hill and coming down on top of me causing a sinking sensation.