[Boone nearly walks into Tuco when he stops, and grunts. He assumes he's stopping because of the spider corpse, rather than being briefly entranced by the thought of all that gold, but before he can tell him to get a move on he's stepping forwards again.]

Never seen a living spider lying on its back like that, so yeah.

[It looks like it's been there a while, too. He can see something else down there, but he doesn't know what it is. He squints down at it, as if it'll help him make out the shape better.]

There's something else down there.