Club scene where an arm on the wall starts to move is a reference to the arms that come out of the walls in this film
Rachel impales Deborah with CD disks, similarly to the way Pinhead kills DJ.
One of the people on the bus, is meant too look like the camera cenobite in part 3
Moz mentions it, referring to Jason of Silicon Valets' new piercings
It is mentioned in a magazine.
Photograph is shown.
Therman mimics Pinhead's voice and repeats his line, "Bring her to me, boy."
DVD case is shown.