Spencer is angry. And, really, you do not want to mess with Spencer when she's angry.
Added:

Pretty Little Liars Season 3 Episode 17 Quotes

Ashley: Has Caleb been tangling with Mona?
Hanna: Tangling? I don't even know what that means.

Wow, that's like the world's fattest man giving dieting tips.

Hanna(to Aria)

Pretty Little Liars Season 3 Episode 17 Music

  Song Artist
Song Until It Hurts Fransisca Hall
Tic tic boom for feeling For Feeling Tic Tic Boom! iTunes
Secret wish flick of a switch Flick Of A Switch Secret Wish iTunes