Place it immediately after the dance music peaks, so it stops the routine in its tracks, then follow it with a confused reaction sound or Shut Up Mom for a second telling-off before the scene moves on.
About this sound
This clip is a single spoken line lasting just under four seconds, delivered as a blunt demand for someone to stop dancing. It lands as funny and exasperated, the kind of over-the-top annoyance that makes a small interruption feel much bigger. The line comes from Monty Python.