Put it right after the boast or delay in your edit, as the turning point before the action finally starts. Pair it with sudden suspense beforehand to build the wait, then follow it with oh my god wow for the reaction once everyone moves.
About this sound
This is a short spoken line, lasting just under four seconds, delivered in a firm, impatient voice that tells someone to stop posturing and get moving. It lands as a blunt, funny pushback, sharp enough to cut through dawdling without sounding angry, and its direct wording makes the impatience instantly clear to anyone hearing it.