Who influence

One night a friend and I decided to go out and get something to eat. On the way back home, we stoped to get some gas. I happened to be wearing my Who shirt from the Quad tour (the white one with the blue around the sleeves and colar and the bullseye in the middle). When I walked into the station to pay for the gas, the guy at the counter (who happened to be very cute, but I digress) who was probably no more than 5 years older than me, which would make him about 20, leaned over to look at my shirt. "Ah, The Who," he said, "At first I thought that was a Pearl Jam shirt." "No," I replied, "But they were influenced by The Who." "Yes, I know. That one track on Vitalagy (he said the number of the track, but I can't quite remeber it) they took that opening chord progression from The Who, right?" Needless to say, I would have been very happy to stand there all night and discuss The Who's influence on Pearl Jam, but my friend was ready to go.