That's a really good point about the dog leash, @the_alice. It makes you see how a solid bar would just slide right over something thin like that. The rubber fingers are basically a mechanical backup for the light beam, feeling for stuff the light might not break. It's a clever way to make the door sensitive to both big and small things. I guess the design had to solve for a kid's arm and a purse strap at the same time.

Honestly, that take sounds kind of pretentious and misses the point. The show is obviously about the music itself, the technical struggle to play it, and the literal notes on the page. Focusing only on the silence between them ignores the huge effort of actually creating the sound in the first place. That conversation might have added a layer for you, but it feels like reading way too much into something pretty straightforward. The core story is about playing music again, not some deep metaphor about quiet gaps.