[Astrid had the blankest stare when Hiccup was first explaining it, but when he sixed over to the axe analogy, she at least looks more interested. She tilts her head thoughtfully, though at the end she finally shook her head.]

Not...really, but I guess it doesn't matter. I mean, I sort of get the axe...thing. But no matter how fast I swung my axe it wasn't going to make a light go on.

[She just wasn't going to get this without a lot more studying, which she wasn't all that inclined to do.]