This day in theme parks, August 1st: Uni Social 2010 null 2011 HHN’s first tweet! Originally called UORHHN You asked for it, remember that. We will haunt, taunt & direct… or misdirect you for Halloween Horror Nights 21 at Universal Orlando. #HHN — Halloween Horror Nights (@HorrorNightsORL) August 1, 2011 […]