Surfers have been doing airs and grabs for awhile now. I surf in NJ, which I wouldn't exactly consider a hot spot of the latest, greatest surfers, but people have been able to do those things for awhile even around here. Getting air on a surfboard takes a lot more practice than on skis. You could probably huck it off a jump after not skiing for very long (hell, a lot of skiers do) but I've been surfing for years and I still can't land an air.