Place this clip as the verdict near the end of an edit, after the mistake is shown but before the reaction shot. Follow it with the WTF Boom Sound Effect for a bigger collapse, or close the sequence with The End Meme Sound.
About this sound
A 29-second clip built around a deep male voice delivering the Japanese line 'Omae wa mou shindeiru,' meaning you are already dead, followed by a swelling score. It feels menacing and funny at once, turning a quiet threat into an overblown payoff. It comes from Fist of the North Star, spoken by Kenshiro to a beaten opponent.