Watching Shawn ride in person is unreal, it's amazing how well that guy rides a snowboard.
Regarding the straight air. Yes SOME (but not all) judging formats in snowboarding require one "standard maneuver" per run (standard maneuver is defined as anything less than 360, so they can also fill the requirement with an air to fakie or alley-oop).
Anyways, while I don't like the "requirement" rule, I do like the way snowboarders generally do at least one trick in their pipe run that is purely about style and not difficulty focused. A huge, motionless, well grabbed straight air looks awesome in my opinion, and since Shawn can do 2 different doubles, 4 different 1080s, 1260s, etc., the straight air adds variety and style to his run. For sure he could have done any number of technical tricks first hit had he wanted, but snowboarders appreciate a well executed straight air, and the ones that I have talked to about it, say that they see it as part of a complete set of pipe riding skills. Personally, I think an huge stylish straight air is great, anyone remember the one Sean Field did at the Open in Vail? One of my favorite pipe hits ever...
But I digress, what I really wanted to do on this thread was post this link (hope it works). Yes Shawn and Luke are stepping up the game, but check out what Mike was doing in sketchy 12 foot pipes back in 1998: