Article continues below advertisementAndy Cohen stormed off the set of the Real Housewives of Salt Lake City Season 6 reunion, marking his first time doing so in the franchise's 20-year history.In the heated trailer for the three-part special that dropped on Tuesday, January 6, the Watch What Happens Live host could be seen getting up to leave his seat as the women protest. Mary Cosby was heard pleading, "No! Andy, please," but he ignored her, declaring, "I'm walking off."Article continues below advertisementSource: Bravo/YouTubeThe trailer for 'RHOSLC' dropped on January 6.