She said "Across the street is a big empty office building where something abbreviated as B&B (Bones, right?) is in their second day of production. Other than the B&B, there is a FBI truck there. There are no police squad cars like the folks in Fillmore had that could conclusively identify what was being shot."
Later on, she was able to confirm that it was indeed a scene of Bones being filmed saying, "It is Bones that is shooting near work. I walked over and saw them film a couple of scenes, including one with Booth, Brennan and Hodgins. It was near the end of the episode (I think) and part of the scene has Booth grabbing a guy off of a bicycle and throwing him against a squad car. It was an action scene. If you could see me you would see me doing my happy dance.
"I am so excited. You know, David and Emily look so big on screen and so little in person (Cliche, I know. DB is still taller than me.) DB is so thin, but gorgeous. He also looks really young. ED is gorgeous and beautiful and looks fabulous in red."
You can read more of that conversation HERE at the Boneyard.
on DVD today at 
as well at