I was at HHN on 10/18/2012 and saw both groups when I asked a team member about the characters and what they were he shrugged and steped aside and there stood Laura Wallace the Director of the streets. After having an HHN geekgasm I tried to compse myself and she explained the zombies are more 28 Days later fast moving zombies. They did great! I saw then hiding in plants and diving out allot of crouching, leaping, and charging. The others she said is a more nostalgic look back at halloweens past I was purplexed by them lots of stilts in the group and it felt like some of the costumes looked like 1920's film actors dressed up for a halloween party. Also saw Dee Snider and the folks filming Celebrity Apprintice All Stars there that night so perhaps we will see a but of HHN on the show this season.