Say 'queso' for this group photograph

American photographer Spencer Tunick said he hoped to draw his largest crowd of nude people for a shoot next month in Mexico City's enormous Zocalo, which can hold more than 80,000 standing people. Tunick's record is his shoot in 2003 with 7,000 volunteer models in Barcelona, Spain. Shown above is one of his photos from a few years ago and that's not sheep grazing.
From Times Wire Reports
Here's another of his photos. I wonder if this is some kind of reaction to the performance.
This Spencer Tunick photo was taken in New York's Central Park.