Place it as the big reaction at the end of a setup, after the absurd claim has landed, then follow it with Oh My God Wow for a second wave of disbelief, or with Nelson's Ha-Ha! when the moment turns into open mockery.
關於此聲音
This six-second clip is Ratinho saying Abobina and then holding a long Oooooooo, a single stretched vocal exclamation with no other words. It feels deliberately over the top, comic and a little unhinged, like a reaction that refuses to calm down. The shout comes from the Brazilian television presenter Ratinho.