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Put it at the end of a car clip, just as the vehicle pulls away, then follow it with an air horn for a bigger payoff, and save the Ba Dum Tss drum sting for the next beat if the joke needs a second punch.
About this sound
This is a short 1.7-second clip built around a big, low vroom and a repeated ahh ahh vocal, with the engine sound and the voice packed into one quick burst. It feels silly, loud and over the top, like a joke rev that goes past the point of cool. The switch from rumble to drawn-out ahh gives it a playful, exaggerated energy.
