Why did I even notice this?

It's strange how some of the funniest things in life are incredibly sad. Tonight on the subway I saw a man stumble onto the train. At first I assumed he was drunk, but he sat across the hall from me and didn't seem it, so he must have just been tired or something.

He was just kind of minding his own business, eating a McDonald's cheeseburger. He took a bite, then when he went to take a second bite, it fell out of his hand onto the floor.
He looked down at it, and I thought he was going to swear under his breath or something, like I would have done, but he just stared for a minute, like that cheeseburger was his one last joy, and he dropped it on the floor. It was honestly like something out of a silent movie.