Place it immediately after the mishap in your edit, once the audience has seen what went wrong. Open with It Was At This Moment He Knew to set up the blunder, follow with this clip as the denial, then close with Fail Sound Meme when the excuse finally falls apart.
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This is a very short spoken clip, lasting just over a second, in which a calm voice delivers the line 'just a scratch' as though nothing serious has happened. The flat, unbothered delivery makes the understatement land as dry humour, turning a bad moment into a joke about refusing to admit defeat. It feels cheeky, defiant and instantly quotable.