Never mind the Balka

When Miroslaw Balta conceived his How It Is installation for Tate Modern's Turbine Hall, he would have intended his container to black out all light and for people to be completely disorientated by the experience.

He would not have bargained for visitors' resourcefulness. Everyone used their mobile phones as miniature torches, and the pitch-black effect was reduced. It was not exactly a Blair Witch experience.

The only way to get the full effect of the piece is to visit the place on your own and promise yourself not to cheat.