Zombies rule Robson Street

I don't really understand the rules or indeed the point of a Zombie Walk, however it seems an awful lot of blood curdling screaming is required.  A somewhat surprising turn of events on a Saturday afternoon, right now outside my hotel. I have however discovered that at least two zombies have an excellent sense of humour. As I was walking down the street in the evening, a woman approached a zombie two-some and asked what was going on, why were there so many zombies? Zombie man replied "I don't know what you mean, we always dress like this. Are you saying there are zombies around here?" Well played, sir.