Place it right after the mistake lands in your edit, then follow it with My Leg SpongeBob for a second cartoon reaction before the scene moves on. For a longer Homer moment, pair it earlier with Homer Ta Gueule so the two Homer clips build one running gag.
Über diesen Sound
This is Homer Simpson's short, muffled umph, a single low grunt lasting about 1.6 seconds that sounds like he has been caught off guard or hit by a small setback. It feels awkward, sheepish and instantly funny, the kind of noise that turns a clumsy moment into a joke without needing any words.