In addition to "Duper's Delight" (I didn't know that one before learning it here), CW also does the "Surrender Cobra." A Google image search for the term shows photo after photo of sports fans of losing or imperiled teams doing this exact same thing.
This picture is snipped from the video of CW inside the neighbor's home - the one where he panics while watching the neighbor's security video.
Edit: Sorry if this is OT - I know this body language was discussed a few threads back, but I wasn't caught up