Forgotten

I'm on my way to a meeting being held in town. No travel necessary, just a short ride on the subway. At the "L'Enfant Plaza" station as I am walking on the platform toward the exit, I see a young guy with 2 suitcases in front of him. He is padding his pockets, with an anxious look on his face. I see him look in a small bag and then back in his pockets. Clearly he is missing something that he cannot find. Leaving the bags behind him, he rushes back toward the train which is ready to leave the station. The young guy peers through the window, clearly trying to see where he was seating, looking for whatever he cannot find. The subway doors are closed and even if he could see what he forgot he would not be able to retrieve it. The train starts moving and the young man has to let go of the window and of the train. It is not clear from his face if he saw something or not.
He should get back to his other bags before they disappear too.