Place it at the end of a price reveal, right after the wrong amount is shown, then follow it with the DJ Airhorn for a comic switch from failure to celebration, or use the Law and Order Dun Dun beforehand to build suspense before the guess is exposed.
About this sound
This is a short, low foghorn blast lasting about two seconds, with a deep, drawn-out horn tone that fills the moment. It feels dramatic and funny at once, like a grand announcement collapsing into a friendly letdown. It comes from The Price Is Right, where the horn marks a wrong guess or a lost prize on the long-running television game show.