Quote Originally Posted by No Contest
Its a move you can land, but it is really slow. Its all timing, I only try it when my opponent gets winded(theyre just standing there mostly) its like a fireball motion from streetfighter, but you start with the thumbpad in the middle and do a wind up so the thunmbpad is on the bottom then roll it up to the top. The side you use and starting point effects what type of ko punch you throw. It is kind of hard to pull off....(this is ps2 version)
You might be thinking about the flash KO, the instant KO's that I've experienced just seemed to come out of ordinary punchers.