Place it at the exact frame the mistake becomes visible, then follow it with the faaaa meme sound button for a bigger fail or the damn meme sound button when you want a shorter, sharper ending to the same beat.
Über diesen Sound
A very short clip of a single voice dragging out a voooeeerreeeuhhh groan for just over a second, with no words, music or other effects. It lands as funny and fed up at the same time, the sound of someone reacting to bad news, a silly mistake or a plan falling apart without needing an explanation.