[Scorponok]

Well, in CvsSNK2 when Akuma does it, he stands on one foot, bringing the other one up onto is ankle, bending at the knees. He holds his hands kind of up with his elbows bent, then he just slides across the ground with little transparent images of him following, then he grabs the person, the screen turns completely black, you can't see anything, then you see tons of explosion things flashing all around where the guy was, can kill a guy then the black disappears and it shows the other person on the ground with Akuma standing above. If it manages to KO the other guy, the whole background will turn black with a huge symbol of what's on Akuma's back taking up the screen, and you hear some weird sound, plus the opponent's KO scream yeah I know, pretty dum post..