What happens when a group of performance artists goes undercover at Tate Modern? Ordinary activities like standing in a queue, traveling on an escalator, or listening to a gallery tour guide take on strange new dimensions. Artists Dora Garcia, Jiri- Kovanda, Roman Ondak, Mario Garcia Torres, Nina Jan Beier, and Marie Jan Lund explore the way visitors behave in a museum, subtly intervening to disrupt the usual codes of conduct. [4:34]