A violent new "game" called "Knock Out" proves literal as unsuspecting people are rendered unconscious for no reason
Washington DC police are connecting an assault on a 27 year old woman on this new trend.
Police say she was walking through Columbia Heights at around 10 p.m. on Thursday, when a group of what is thought to be eight men on bikes came up behind her. One of the men reached out, punched the woman in the head as hard as he could, and rode away, NBC Washington reports, like a boxers version of a hit and run.
