A persistent paparazzo is learning the hard way that no means no when Rihanna’s bodyguard says so. Video circulating online shows a member of the pop star’s security detail laying out the photographer with a single, hard-fisted cross check to the face. TMZ.com says it happened as Rihanna tried to leave the Whiskey Mist nightclub in London Sunday night. Rihanna was already seated inside her car when her bodyguard delivered the punch. No word on the condition of the photog.