At the Guggenheim, Tino Sehgal's "This Pancake," 2010

Alicia Desantis in the New York Times:

The men and women in the room were part of “This Progress,” a work by the British-German artist Tino Sehgal that took over the rotunda for the last six weeks. In the piece, which closed Wednesday, visitors were ushered up the spiral ramp by a series of guides — first a child, then a teenager, then an adult and finally an older person — who asked them questions related to the idea of progress...

Asad Raza, the producer of the exhibition and the recruiter of most of the guides, said he had seen the work improve over time, as the guides became more relaxed and more willing to be themselves. “There was a kind of anxiety about being chosen for their intelligence,” he said. It could lead to grandstanding. By the end, he said, the piece had become more personal...

In the reading room where the adults gathered, a joke circulated in which a guide pushes a particularly annoying visitor over the edge of the ramp rail. Gesturing toward the body below, the guide would announce the title of the new work: “Tino Sehgal, ‘This Pancake,’ 2010.”

More here.  [Photo shows 3QD's own Asad Raza, producer of the show.]