Sunday

It being Sunday, of course, it's:

Sunday, Sunday, Sunday! Amphetamine Motor Speedway! Sunday!
See the amazing wheel-standing rapping lunatic Corvair! Sunday!
See Shad Crapper light his nose hairs on fire as he pulsates and blasts down that quarter mile thrillway! Sunday!
See Tim Leary and his Superblown head! Sunday!
See Big Daddy Roth and funny cars from across the universe! Sunday!
12 bucks buys you the whole seat, but you'll only need the edge! Sunday!
Be there!

Rico says he'd've sworn it was a Firesign Theatre bit, but it seems it was based on reality: "Jan C. Gabriel's name may not ring a bell, but his voice surely will. It was Jan Gabriel who first came up with the phrase Sunday! Sunday! Sunday! for the US30 Drag Strip and Sante Fe Speedway television & radio commercials. These commercials were arguably the catchiest local commercials ever."