On tap at Ambulance, Vermont’s Grassroots Brewing collaborated with local Hill Farmstead brethren and Alaskan brewmasters to concoct hybridized brettanomyces-laden farmhouse ale. Rustic herbal overtones and musky barnyard leathering divert lemony orange-peeled grapefruit, pineapple and peach tang. Cilantro-peppered basil and rosemary illusions convincingly deepen citrus tea finish.