With Occasional Showers is like a comedy hit and run: over before you know it has begun, it leaves you stunned by an onslaught of gags about relationships, sex and being an asshole. Its finale is so surreal and utterly surprising that not even the previous 45 minutes could prepare you for it. It will stay with me long after this Festival is over. (Cate Simpson)

Holyrood Too@Faith, 225 9764, until 27 Aug, 6.45pm, £6 (£5).