Hundreds of people queued to become part of the work of performance artist Marina Abramovic as she began a 64-day in London today in which she is simply interacting with the public.
The Serbian-born star of the art world is allowing anyone to drop by and enter the empty and blank-walled studio space at the Serpentine Gallery although only 160 people are allowed at any one time.
They can enter only when another visitor leaves and with people able to stay as long as they choose at the free exhibition, they potentially face a long wait.
Some were said to be in tears as a result of the experience, although electronic devices are banned from the event to ensure participants live in the moment rather than spending their time filming, taking photographs or sending messages.
A preview event on Monday saw her leading visitors by the hand to various positions in the gallery then whispering short instructions to them, while others followed her around to get a closer view.
The limit on visitors has been set by the number of lockers installed in the gallery's foyer to allow them to leave their possessions before entering.
The show, called 512 Days, is expected to be a big word-of-mouth hit as fans take the opportunity to get close to the internationally renowned, US-based artist and be part of her work.
In 2010 she staged an exhibition in New York's MoMA gallery in which the audience was invited to gaze into her eyes as she sat on a chair over a three-month period.