It's only a thought I had before coffee, relax.
As the train approaches, a young boy bounces boldly at the platform edge to the squeals and delight of his friends standing safely behind him. His feet hop rhythmically over the painted orange line running the length of the platform that warns future straphangers the slightest misstep in this area could turn them into an unpleasant delay if not careful. Once his bouncing fit concludes, the boy begins swinging his arms in a jerky robotic motion; first upward, then out into the open space of the track. While he's looking around at his friends as if hoping they see his bravery, I'm silently hoping the train picks up speed and lops an arm off at the elbow. This, I believe, will cure him of his desire to impress others at the risk of harming himself.