Put it at the end of a failed attempt, after the action and just before the reaction shot. Pair it with SpongeBob Fail for a bigger flop, or follow Dun Dun Dun with it to turn a build-up into a letdown. Keep it as the closing beat, not the opening one.
关于此声音
This is a short descending trumpet phrase in the classic sad-trombone style, played in a few low, wavering notes. It gives a listener an instant sense of comic disappointment and awkward anticlimax, as if a hopeful moment has quietly collapsed. It works best as a gentle, knowing reaction rather than a harsh sting.