The original manager of the Rolling Stones, Andrew Loog Oldham, acted out his own form of emotional contagion in 1965 , from the back of the theatre where the band would perform. As the band came onstage, he noticed that if he crouched down to be out of sight and screamed in high-pitched voice, then everyone would would scream with him. The rest, as they say, is rock and roll history.
Excerpt from: Tarzan Economics: Eight Principles for Pivoting through Disruption by Will Page