[Stiles cocks his head to the side and watches Aggie and Arya, a grin on his face as he hops down nimbly from the top of the wall, stepping around a mine he knew was planted and shoving his hands in his pockets. He's still invisible, and he stays back a little as Aggie makes her progress.]

That's called a figment. Get it, figments of our imagination? It's hilarious. [Deadpan.] You want to try and grab as many of those suckers as possible--go ahead, reach out and touch it. [Stiles glances down at the little stopwatch he's holding and calls out;] But quick, though!