Many, but the first one that popped into my head was Pink Floyd at Madison Square Garden in NYC when they launched their Animals album in 1977.. Giant animal balloons flying around.. dogs, pigs, sheep... quite memorable.. born in NYC, lived in HK from ages 13 - 16 then back in the USA. I was 16 in 1970 so I literally grew up in the 70's.. All i can say is fond memories of what I do remember.