The speaker watches someone in visible distress: hands shaking, teeth chattering or breaking apart. The person seems to wonder what the speaker is thinking, but the speaker is stuck in a quiet struggle, searching for the right words to reach them. That word "Contemplating" sits alone on its own line, and the pause makes the hesitation feel real. The speaker wants to help but can't seem to find a way in.
The ending shifts to the other person, who lies down and thinks, "The lights went out." Repeating it makes it sound like a dull echo, or like someone trying to understand what just happened. The poem doesn't say whether the lights are literal, or whether they stand for losing hope, consciousness, or a sense of connection. That vagueness is part of the effect. The mood is tense, helpless, and sad, with a sense that the words came too late or never came at all.