We Don't Know What We're DoingA young video shop assistant exchanges the home comforts of one mother figure for a fleeting encounter with another; a brother and sister find themselves at the bottom of a coal mine with a Japanese tourist; a Welsh stag on a debauched weekend in Dublin confesses an unimaginable truth; and a twice widowed pensioner tries to persuade the lovely Mrs Morgan to be his date at the town's summer festival Set in Caerphilly, a sleepy castle town in South