Sigh. Freaking photo variations.
Apparently instead of continuing with the legends variations, Topps has included 20 or so photo variations of various cards in both series one and two in 2012 Series One. The rally squirrel is one of them. Eric Hosmer has two (one of him and team mates on the bench and one of him getting drenched in Gatorade). Pablo Sandoval has two. Ryan Braun has one. The list goes on.
I suppose I should be thankful though, this will get me to buy less not having to chase the legends, 'cuz there aren't any.
One thing is certain though; Check your base cards!
EDIT; Here is a page with all the info right here, complete with photos.