Interesting. I'm gonna recheck Kitana, trying to do only the last hits of strings.Ok Steve, so I couldn't get it either with Jade or Skarlet, but for Scorpion's 334, if only the last hit connects(or the 1st and last, since those can hit but the 2nd can whiff) you will get the stand up.
Everyone follow Soonk's posts. Try EX moves, try having other hits whiff.
I tried Skarlet f+3 a million times and never saw it. So unless we get more sightings I can't add it.