TF Chaos in South Park

Rather than split up so as to make an easier target for any possibly local serial killers the boys quite sensibly decided to stay together and headed upstairs to take a look at the rest of the house. When they get up the staircase there really isn't much to look at, it's dark run down and the odd shaft of light breaks in from a boarded up broken window. So not that different from a typical best western then?

The boys notice there are corridors leading off in different directions around this floor of the house, they turn left and head down the corridor then stop to look at the various doors. Do they go into one of the doors or does something else happen?