With the Delightful Sausage’s recent show, plus Crizards in the building next week and this irresistible hour from Crybabies, narrative sketch comedy is having a moment, in Soho theatre at least. Bagbeard has loads going for it: a Stranger Things-alike story that’s three parts ridiculous to one part tender-hearted, lovably knowing meta-theatrical trickery, and no opportunity missed to score a laugh, cheap or otherwise.