Warning, video contains swearing.
This moment when Daigo parried Chun Li’s super and countered with an ultimate combo cancelled into his own super, turning around the entire match and defeating his opponent in the process. This went down in history as one of, if not, the ultimate tournament comeback.
EDIT: He pulled it off AGAIN! And in mid-battle! He still lost the match, though :-(
How difficult is it to do that parry-and-counter combination? Pretty difficult if this is anything to go by…