Yes! That step down is where the set ends! You are literally seeing the edge of the Saved by the Bell universe where it meets that of the real universe where real people like us really live. On one side, Jessie is in a caffeine coma. On the other side, a director is barking orders to crew members while a pretty boy fetches him coffee while watching a little dog. (Sorry, I'm thinking of director Kenny Ortega.)
Feel free to share what stood out to you in the comments below.