In a darkened lecture theatre, performance artist Nick Steur plays geological ‘Jenga,’ stacking stones to produce impressive, impossibly balanced towers. He works without glue or tools, just patience, steady hands and a seeming disregard for gravity, delighting in mixing tricky contours and textures, consciously choosing the most challenging combinations. As these startling, unlikely sculptures take shape, a text plays from a speaker strapped to Steur’s head, giving insight into his process. Its dry delivery gives the show a documentary feel, but also creates an intentionally monotonous soundtrack to the rock-piling. While insightful and amusing, it’s an awkward counterpoint to Steur’s contemplative, intensely-focused silence. It may be bemusing, but this strange, skilful, slowly paced performance is oddly absorbing too.

Summerhall, until 25 Aug (not 19), 6.15pm
tw rating 3/5 | [Dave Fargnoli]