"Hitting air" achievement is broken, has been broken and will be broken devs know how long.
It's been only achieved by 15 players, considering that five out of the (nublet) wushu games end with neither player getting any points.
And yes, points you get from DQing count too.
Summa summarum: Achievement is broken and only way to get it, is get some TSA to add it for you.