Place it right after the panicked reaction in your edit, as the reply that resets the scene, then follow it with a laugh or a cheerful reaction sound to move the joke forward.
Über diesen Sound
This two-second voice clip has Chapolin Colorado repeating 'Palma, palma, não criemos cânico!' in Portuguese, a short plea for calm delivered as if the room is about to lose its nerve. It feels comic and reassuring at once, because the hero calling for calm sounds like the most nervous person present. The line comes from the television comedy El Chapulín Colorado.