I have the Mortal Kombat Trilogy for both PS1 and PC and I have problems doing the finishing moves. According to http://www.mortalkombatonline.com/content/games/umk3/noobsaibot/, Noob Saibot's second fatality is:
(Close) Hold Block, Down, Down, Up, Run
So I hold down 5 (block) and press (not hold) down, down, up and 2 (run). He only weirdly crouches/holds block and nothing happens. Is there a trick to do it or something? Because from what I've seen in videos, the character doesn't move at all while performing the special.