The line comes from Dragon Ball Z, where Vegeta uses a scouter to measure Goku's power level and is stunned by how high it reads. In the original Japanese version the figure was eight thousand, while the English dub famously changed it to nine thousand, which is why Portuguese versions keep the eight thousand wording. The scene became an internet reaction meme for anything unexpectedly large, and Brazilian and Portuguese-speaking creators still reuse the dubbed shout because it is instantly recognisable and funnier in its familiar local form.