So my first reaction to this was good for Allison, saving what lives she could. My second was well crap, I though the mountain ash thing was special to Stiles. But there is an interesting difference to note here. Allison pushes her hands into the ash and shoves it out of the way to let the werewolves out. Stiles doesn’t touch the ash to move it. He sweeps his hands over it and it’s not just that it blows away a little like if his hands caused a breeze. It splits, like a clean break.
Which to me just further emphasizes that while things like mountain ash might be usable by humans, it takes something more to wield the magical properties.
Yes, exactly. I’d say that it’s something humans can easily enough interact with and act upon, because its supernatural properties don’t affect them, but it takes something else—it takes that act of “being a spark”—to activate those properties in the first place.