Worker learns his lesson when he finds out who the old man he has been pestering really is 

Who is this?

Jeffrey walked straight past the elderly man on his way to his desk. He was just about to dish out a generic insult when he stopped in his tracks. He didn’t recognize this man. Who was this? Why would someone his age stoop down so low and take up a cleaning job? He must be too poor to support himself in his old age, Jeffrey thought.

Jeffrey decided to take his frustration out on the janitor.