Well, if Ruby won't bring it up, he can trust there isn't any reason for concern. He can't shake off the feeling the broken glass is potentially a time bomb, though, until Ruby snaps his focus away from that. One. He believes she knows best about what she does. And two. She is an expert at telling him what to do. There aren't enough words to begin to accurately describe how she clears his mind, now not withstanding. Over the doors shouldn't be difficult for someone his height. He answers with a somewhat hesitant chuckle. "What? Uh... uh. Okay. Let's not dig too deep into that, maybe."

The sound of Sam breathing calmly is all hers there is. A few minutes is no time and all, and Sam takes note of the steps she goes through with interest. Magic isn't new for the younger Winchester, of course, but this process is clearly unique to Ruby. It says something about her methodology. What stands out most is how the droplets of blood for the spell hint how personally connected Ruby is to magic. It's one silent observation he'll keep. Nonetheless, the spell is something. His eyes follow her finger to her mouth before they're drawn to the sigil in the book in her lap. Does she know how distracting that is? "Don't suppose that will need a bandaid," he poses it slightly like a question. When he realizes her likely answer, he nods and takes one of the brushes to dip in the magical ink. The door is closest so he turns his head back toward it, thinking he will start there.