To me it looks like a case of no aileron into wind.
In fact, I dont think they gave aileron at all during the whole maneuver;
Below, the moment before decrab. Crab angle about 15 deg.
1. Below, rudder gets kicked in
2. Plane decrabs to 0 deg, beta angle now about 15
3. Wing comes up due to yaw induced roll. No sign of roll spoilers.
4. Pilot releases rudder pedal, wing hits ground, STILL no sign
of aileron or rollspoiler.
http://www.airliners.net/uf/53688288.../phpOltUWB.jpg
5. Being in a beta angle and bank without any controls input, the acf will now
swing back to equlibrium. The nose will swing back to 0 beta (crab 15)
and the wing will drop.
So, no gust or aileron input needed for this to happen.
M