Place this clip at the end of a confused reaction sequence, right after the explanation finishes. Follow it with a bruh sound for the letdown, or put an emotional damage hit before it when the confusion comes from a bad result in a game or test.
About this sound
This short voice clip features a man saying the Portuguese line 'Eu não entendi mas tô compreendendo' in about two seconds. It captures that funny, awkward feeling of being completely lost while slowly pretending it all makes sense, nodding along as confusion turns into fake confidence.