Hmmm.... that's funny.
Remember the "Open the Pod Bay doors." command that had irked Siri a few months back? I've noticed that her answers seemed to evolve with the frequency of me asking (once-twice a week just to annoy it/her)...
Today I got an interesting response.
Me: "Open the Pod Bay doors."
Siri: "I'm sorry, but The Pod Bay Doors is not an installed application."
My reply to no one in particular: "Hmmm.... that's funny."
Me: "Open Music."
Siri: "Launching Music."
Music App opens
I don't remember Siri being able to launch apps, but it seems it/she has learned how.