My theory actually is that that Zack Ryder sign was a plant, to play along with the angle of Punk's accusations of Vince.
I mean, it just flat out says "Zack Ryder" with the Ryder head logo. Most regular Ryder signs say "WWWYKI" or "We Want Ryder" or "Ryder or Riot" or "Broski of the Week" or whatnot.
That sign was plainer conceptually than almost all the others, IMO to help casuals understand what it represented, and it was EXTREMELY perfectly placed.
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Thank you, Eddie Guerrero.
http://cdn.buzznet.com/assets/imgx/1/5/2/7/4/5/7/1/orig-15274571.jpg