Metro Nexus, as most would guess, is one huge commercial and social hub. The unseasoned dimensional traveler could get lost in the hustle and bustle of millions of dimensional travelers rushing about their own businesses.
Fortunately Susan was a very seasoned dimensional traveler and lead the group of kids and escorts unerringly to Doctor Milquast's Museum of Murderous Mayhem. The multi-verse's largest Halloween attraction.
The building was nearly 12 stories tall and covered about as much ground as Grand Central Station. It was a unstructured amusement meaning you started at the ground floor and wandered through it as you saw fit. Eventually you would find yourself at the very top of the building with the only way down was to ride a 'crashing elevator' back to the ground floor where you would find the exit.
As guys dressed in costume enticed and herded Susan, Miki, Victor and the kids, along with other customers in the front of the building, a dark rip appeared at the back of the building and several real living nightmares entered through a maintenance entrance.