You hurry to the elevator banks and slide into one before the door shuts. You expect to find Greg but he isn't there. You press the button for the top floor and ride all the way up. You look around but don't see Greg or the teen. You stay there, just in case, until it starts to get dark and security moves people out of the building. Only then do you return to your apartment and sit on the couch. You check the news but don't see anything about Greg. At least that's one good thing about today.

What do you do?