Things look and sound terribly familiar, and it makes him feel more melancholy as a result. While he may not understand what exactly this dream represents, he isn't surprised to see that this is part of it.

He comes to a stop, peering into the darkness to see if he can discern the source of the music - and leaning over the edge deliberately, to see if something will be lured out by his presence.

If not, well, he's just going to have to take the plunge. But he'd rather try other methods, first.