Where does online friendship stop and real friendship begin? Does the distinction matter? In 2011, Brian Lobel played a brutal game of friendship maintenance: over five days, he gave strangers one minute to decide which of his 1,300 Facebook friends to keep or delete. The deleting was real, the pace was maniacal, the results were final. Fifty hours of performance, 800 emails from angry, amused and intrigued friends and over 2,500 comments from strangers online later, Purge the stage show was born.

Click here for Part 1 of the installation: Or else your friends will have to do it

Click here for Part 3 of the installation: Love Letters and Lehman Brothers