I worked in a supermarket through high school, and one of the great pleasures of the weeknight shift was punching out just in time to drive home to “Get the Led Out,” 101.1’s 10pm rock-block of Led Zeppelin songs. The likes of “Kashmir” and “Trampled Underfoot” were staples of the set, and I’d crank the volume to obnoxious levels as I rolled through town behind the wheel of my mom’s car, feeling groovy in my apron and tie. Much as I loved the stuff, though, it would be years before I actually owned any Zeppelin, because it’s always been my experience that a guy can turn on the radio at any time of the day in any part of the country and hear them on at least one of the classic rock stations. So why buy the cow?, as they say. Anyway, what this means is that while I am quite familiar with the band’s catalog, I only know a select few of the songs by name, and neither side of this single was one where I’d bothered to mentally pair title with riff. “Black Dog”? The one where it sounds like Jimmy Page and John Bonham go out of synch with each other during the bridge (that section has always kinda annoyed me). “Misty Mountain Hop”? The one with the funky-strut electric piano part reminiscent of “Mama Told Me Not to Come.” So yeah! You, like me, may not remember the titles, but you, like me, have heard ’em all and know ’em all, because MAN these songs are hooky and memorable! AND THEY’RE PLAYED CONSTANTLY ON THE RADIO.