When he's alone in the tower, Tony runs JARVIS shutdown program nine. JARVIS shuts down the tower, locks the important doors before playing a playlist.

This playlist has songs such as the Kelly Osbourne version of "Papa Don't Preach", "Ain't No Mountain High", "Bump n' Grind", "Spirit in the Sky", "Let it Go", and other such similar songs.

Tony runs around the tower singing them in his boxers. He hasn't figured out that Bruce and Pepper installed a sub-program that has JARVIS record it all, and show it to them later.