While in Dublin I visited an exhibition at the IMMA of Francis Alÿs' Le temps du sommeil, a series of 111 small-scale paintings documenting the artist's 'recorded actions'. These include: carrying a leaking can of paint around Ghent; pushing a block of ice through Mexico City until it melts; wandering the streets with a gun in his hand until he is arrested and using 500 volunteers to move a 1,600-foot sand dune just four inches from its original position.