Superstar rapper Lil Wayne performed at the A3C Music Conference in Atlanta on Sunday night.
But the party atmosphere descended into horror and chaos as false rumors of shots being fired filled the crowd with fears of a mass shooting or terror attack.
Hundreds of people then quickly headed for the exits.
When the mayhem subsided, 12 people were injured. No one was reported to be seriously hurt, however, so all 12 were treated at local hospitals and released.
Police evacuated the venue but its been reported that a fight that broke out in the crowd caused the pandemonium.
Lil Wayne tweeted well wishes to concertgoers shortly after the horror show.