Rachel is the primary photographer for an artist named Terence Koh, who frequently collaborates with Marina Abramovic. Here, he's in a death pose on a piece of hers. Here is another photo of the same set.

Video MoMA VW Gala After Party

Those in attendance included Madonna, Mary-Kate Olsen, Yoko Ono, James Franco, Lou Reed, Patti Smith, Chloe Sevigny, Penn Badgely, Padma Lakshmi, Rose Byrne, Kim Cattrall, Lucy Liu, Marina Abramovic, Daphne Guinness, Terence Koh, Andrej Pejic, Leelee Sobieski, Cindy Sherman, Agnes Gund, Katharina Sieverding, Rachel Chandler, Michelle Harper, David Rockefeller, Jr., MoMA's Director Glenn Lowry, Volkswagen's Martin Winterkorn, and Director of MoMA PS1 and MoMA's Chief Curator at Large Klaus Biesenbach.

Marina Abramovic gave a very controversial performance at the LA MoCA that involved a kind of pseudo/ritualized cannibalism of a female body, and Rachel was present as well.

I found this from a deleted pizzagate post.