From the exhibition ‘When Forms Come to Life’ at the Hayward Gallery, this sculpture is called ‘A Subsequent Offering’ by EJ Hill. He says: ‘Thinking about roller coasters is one way for me to communicate ideas that I have about struggle and mortality and the impulse to go higher and faster and test our physical and mental limits.’
@marlboromaam - apparently for the first presentation of his work, EJ Hill lay on the platform at the centre of the installation, all day, every day, although the article I read didn't say for how long!