Follwing the credits, after the screen is black (or green depending on the cinema) Michael comes back onto the screen and says



"……unbuttoned….button up my shirt…………just let me breathe, I'll come in on my own time……..".



To unbutton/button up:



Idioms & Phrases
button up

Close securely, fasten, as in The house was all buttoned up, or Button up your coat it's very cold. [Late 1500s]

Also, button one's lip. For example, Please button your lip about the surprise. A variant of this usage, button one's mouth, dates from the 17th century. [Mid-1800s]

Finish successfully, as in I've got this report all buttoned up. [c. 1940]
http://dictionary.reference.com/browse/b…..utton%2Bup