This is one of the artworks from Olafur Eliasson's exhibition at Tate Modern In real life. Five spotlights (two green, one magenta, one orange, one blue) combine to illuminate a white wall with a bright white light. When a person enters, they produce differently coloured silhouettes. Everyone was transfixed! We also walked though a kaleidoscope ("Your spiral view") and a 40m passage that was filled with fog and had visibility of 1.5m ("Your blind passenger"). The exhibition is immersive, thought-provoking and unlike anything I've experienced before.