It's not that he's not listening, it's that he's all but perfected the split attention it takes to absorb Joseph's stream of consciousness while also making his own mental notes about a situation. Joseph will catch the minutiae he misses, and Sebastian will push the buttons he finds.

He's taking inventory of the clearing they've found themselves in, and while there's no ring, per se, minus the vaguely circular nature of the area, there are a few nasty looking spikes on some of the plants. It's easy to see how someone could prick a finger out of pure curiosity, and it's only that he's so engrossed in finding whichever one is most perfect that he doesn't do so, himself.

After a quick lap he's drawn back to one in particular, a conical spike wrapped in some kind of moss almost like thread. A quick perusal of the area provides no ring however, though he doesn't exactly go kicking through the underbrush, when an idea occurs.

Sebastian twists the ring off his finger, not exactly easily and not thinking too hard about it while he's at it, and sets it on the spindle, because it's exactly the kind of dumb fucking solution he's been dealing with lately.

There's a hiss that has him stepping back as vines and branches part like stage curtains being drawn up, until a new path is revealed.

He snatches his ring back immediately, in fact cutting the palm of his hand on the "spindle" this time, and slides it into place on his finger. The path remains open.

"Huh."