Makes me think... Berlin'70 was so-so (the band got booed) Berlin'73 was rather bland, Berlin'76 wasn't very good (Köln was so much better) and at the 82 gig the band was still warming-up for the tour.
Well, they didn't get booed in 70.That was the return show after the well-known 65 Berlin riots.In 70 it's been political reasons for some protests. I remember flyers because of Altamont.