Visible crew/equipment: During the scene in the library when Matthew Lillard is forced to tell the husband who the 13th ghost is, you can see the director's face through the glass wall in the bottom left while they are carrying out the glass panel. (01:01:15)
Visible crew/equipment: Halfway through the movie (when the gears start moving) the glass doors begin to close. It appears that a set of four hands are closing them in the top portion of the screen.
Answer: They all have the potential for danger, however some of them are not dangerous. I would say the Torso is not a murderous spirit, though potentially he could be one.