[Stiles' brows go up. He likes Arya--from what he's gotten to see, she's spunky and determined and reminds him a lot of a couple of friends from home. Grinning, he offers her his fist for a fist bump.]

I'm pretty sure that won't work, that whole corporeal thing really puts a damper on it. But if you wanna learn, I'm your man. This is like the one thing I'm good at, and I bet you'll be awesome at it too.