The line comes from the early Saiyan saga of Dragon Ball Z, when Vegeta and Nappa arrive on Earth and use scouters to measure fighting power. In the original Japanese version and several international dubs the reading is eight thousand, while the famous English dub raised it to nine thousand. The Spanish phrasing kept the lower number, but the shocked delivery travelled just as widely online. It is still shared as a reaction to power scaling jokes, stats and any result that sounds impossibly high.