First time that the outside open window gives upon a ground floor level instead of showing higher up apartment level. All the other times Ellen & Spence are in the balcony, they are above ground---in the upstairs floor coinciding with the house's top floor across the way---even though since season 3 and the arrival of Spence, they enter the first floor apartment, without explanation ever given for the change of floors and no move talked about. There have been many episodes with the gang in Ellen's balcony, including the limo one looking for the Travolta party, and they all gathered in said balcony and looked down at the limo. All of a sudden, when the slumber party happens here, Ellen's apartment balcony window is wide open and it is now a ground-level terrace or a patio, as one can tell by the beetle car parked smack in front of the open window.
This is second guest appearance of Kathy Najimy. She first appears as roommate Adam's childhood best friend in season 2 episode 2 (counting first season), then again this episode as a different character that of Paige's boss, then appears once more in season 4 episode 22 the puppy episode as woman in gay bar.