Abramović / Ulay, Imponderabilia (photographic documentation), 1977; Performance at the Galleria Communale d'Arte, Bologna, Italy, shows people passing through a doorway with 2 naked people blocking the doorway. Such an awkward exchange.
There's a great exhibit at SFMOMA called "The Art of Participation" through 2/8. Visited last night with a few friends. Our favorite piece was a rubberband net that partrons are supposed to hold out as a net. 4 women held it out, and a guy ran up and jumped into it, splatting onto the floor. I imagine it was not what he expected!
Some of my favorite comtemporary performance artists are featured like Nam June Paik and John Baldessari.