I remember exactly where I was, and who I was with, when I heard Eruption for the first time. I wasn't a huge Van Halen fan (DLR's antics grew tiresome) but that guitar intro made a me a bona fide rock guitarist fan. Sad.
He had a great run. I just remember every guitar player in school carefully memorizing how to play the Eruption guitar solo as a stepping stone to a perceived mastery level, just after Stairway to Heaven. I imagine millions of retail staff in music stores across the country have gotten their fill of those two things over the years.