The line comes from The Adventures of Rocky and Bullwinkle and Friends, the Jay Ward cartoon series that first aired in 1959, where Bullwinkle J. Moose, voiced by Bill Scott, used it to present his next bit with total confidence. The show mixed Cold War satire, puns and cliffhangers and later lived on through reruns, home video and streaming. Clips of its catchphrases spread in meme edits and reaction videos, and this setup survives because modern creators still borrow its retro optimism before a reveal.