Anyone who caught Arthur Jafa’s A Series of Utterly Improbable, Yet Extraordinary Renditions at The Serpentine would have known that he’s an artist of rare power. So a site-specific work of his is an event, and it doesn’t disappoint. The setting is a tent, based on the marquees of Southern revivalist preachers, on the roof at Store Street, and inside is an extraordinary film. Made up of found footage and newsreel, the piece tracks the black experience in the USA, set to the soundtrack of Kanye’s Ultralight Beam. It’s immersive, dark and moving, and the best thing you’ll see this week.