Add this as a global emote.
http://i.imgur.com/rNqnOcr.png <- That'un. I found it while pausing the Mr. Rogers stream. This glorious double take emote was bestowed upon me by accident. I joined, and this is what my stream buffer was paused on.
This is the new twitch global emote. Chef Brockett perfectly encapsulates the spirit of dumbfounded disbelief.