Place this clip right before the on-screen action in a reaction edit, then let the consequence play out. If the warning gets ignored, follow the fallout with awkward crickets for the aftermath, or save the chipmunk laugh for a light ending after everyone reacts.
Over dit geluid
A 3.2-second spoken clip of the Portuguese phrase não faça isso, delivered as a firm warning not to do something. It feels funny and slightly desperate, like someone trying to stop a bad idea at the very last second, which makes it land as a playful stop sign instead of a real scolding.