Did you think that Luz was going to say something right away? Luz didn't dare. With everything that was happening coupled with the blast she just got, Luz was not about to start talking unless it was to shout they were going to leave at right that moment!

"Get to the yarn!" Luz managed to say, albeit strangled: it looks like they were aiming to hobble Luz with a crackly voice. For right now it was minor, but if they stayed?

They'd want to get even with the humans that messed in their realm.

"That's our only way!"