Glee Cast in NYC

Tinkers here. It seems that new photos have surfaced of the set of Glee, originally posted on the “Pictures from the set” thread on gleeforum.com! This photo depicts some sort of dance session at a mall, lead by Artie! But…where’s his wheelchair?!
What do you think? Dream sequence? Or is Artie going to miraculously raise from his wheelchair and bust a few tidy moves? Click on the photo to view it at full size.
Post below, and click “more” to view the other photo from the set!
Another photo, looking down on the crew and a couple of Gleeks in between takes. If you squint, you can clearly see Jenna and Artie in full costume!