Here's an 8mm home movie from the so-called Summer of Love in 1967 San Francisco. Descriptions of just a few parts of the clip follow. 

A shot of a hill is followed by hippies dancing. One of the hippies holds a staff. A band plays electric guitars and a drum set on stage. Some of the hippies wear sunglasses. An injured girl with a bandage over her eye is briefly shown. A girl wearing bright colors smiles with a purple umbrella. A chalkboard that has math problems and the word “reciprocity” written on it ends the clip.