What is that new South Park commercial modeled after?

"It's driving me crazy" says mefioso to Ask Metafilter, "There's these new South Park commercials on Comedy Central that's a take on some interstitial, show intro, or commercial from my childhood (born in '76). It's the quasi-pinball roller coaster ad, where the silver ball goes by and flips up 3 flags. What are these ads a parody of?"

The answer is still blowing in the wind, as no one has solved the mystery though everyone is having a jolly good time walking down memory lane. Do you recognize this south park ad? Is it a homage and if so, of what? Super adgrunts, watch the ad here:
Comedy Central - South Park - Pinball