Monkey Barrel @ the Tron, EdinburghAsh's audacious conceit dares to find the funny side of tragic events, and partly succeeds, until this rawly emotional show slips comedy's moorings If you thought trauma-comedy reached its limit with Hannah Gadsby's Nanette, buckle up: the American comic Avital Ash is here to workshop her suicide note. A neat idea for gallows-humour standup, right? So you might think, until the tear…
