(But you knew that anyway.)
Tate Modern currently has an exhibition of Gabriel Orozco. No, I'd never heard of him. He's done some photo series, some diagrams and some sculpture. The latter varies between the silly (toilet paper on a ceiling fan) to the more impressive (a Citroën car made much slimmer and an undersized lift).
It also includes an empty shoe box. Now, the other pieces have lines around them, with words like 'don't touch' on the floor.
Guess who kicked the shoe box when passing?
Apparently, it's called 'Empty Shoe Box' and it is supposed to be in that exact location.
I am tempted to ask for the cctv footage and sell it as Art.