Seems like it's used mainly for live crowd trying to keep the masses hyped. I remember HBO whack show KO nation even had live dancers on stands near corners who'd jump up and start flailing away . Stub Hub and Barclays arena have a twist on the audience participation niche with choruses of "Booo..boooooooo..boo boo..boooooooooooo" regardless of how enthralling the fight actually is .