I remember reading a story about John Bonham being with his son Jason before a Zeppelin gig. Jason must have been about 10-12 years old at the time. John watched the band rehearse and Jason sat in on the drumset. I want to say it was on "Trampled Underfoot" but that may be wrong. Anyway, Bonham remarked at the ferocity of the Zeppelin sound and how he never truly noticed it until he watched it from afar.

The 20+ minute drum solo was definitely a late 60s/70s thing. While Mobd Dick was Bonzo's highlight, I always loved his drumming on "The Song Remains the Same," "Rock-n-Roll" and "Achilles Last Stand."