4 ›A 3-way intersection in the normal roomtype. One can hide safely in the cubbies, or outside of the node path (marked with drawings in the 2nd, 3rd, and 4th images) and stay safe from The Angler (and its variants). However, ONLY the cubbies are safe from Pandemonium.
5 ›A dead end room that leads into a vent. There is always a purple keycard door before the vent. The vent is PSS as long as you can't see the entrance points into the vent.
4 ›common room with a broken widow and a left turn. Nothing Noteworthy in this room.
4 ›Basic Room that goes straight. No SS/PSS
4 ›a left turning Maintenance room with an SS in the very corner of the room.
4 ›A short room with a leaking pipe to the right. PSS: hide behind the pipe, crouch, and look down so that your head is hidden.