Noun
hysteria - A state of extreme excitement, fear or anger in which a person, or a group of people, loses control of their emotions and starts to cry, laugh, etc.

There was almost mass hysteria when the band played their final song and some in the crowd rushed towards the stage.
conformist - A person who behaves in accordance with prevailing standards or customs, rather than doing things that are different or original.

The hippies attracted people who didn't want to be conformists to the regular society, but actually they were becoming conformists to the hippie way of life.