This guy really saved me. After I hit the wall (ha ha), he guided me for the rest of the trek up another escalator, through a couple of passages and around a couple of corners, up a flight of stairs to the Gold Line platform. He alternately let me hold onto his shoulder or had me follow the sound of his skateboard tapping on the ground as he walked. He asked how I lost my eyesight, and when I hesitated, he apologized for asking.