Check out the video of this haunted house last year:
The most interesting is at the end where they show all the cameras watching the kids walking through the haunted house. The lamest is when they show a mad Justin Beiber in a padded room.
When I was a teenager, I went to a lot of trouble to make the house scary when people came to trick or treat. I made a dummy with a pumpkin head who had been stabbed that scared so many kids that they were reluctant to ring the door bell, but I never went to the lengths that these people are willing to go.