Janine Parker for The Boston Globe

BECKET — Call it a midsummer night’s dream: There was something magical about the opening night of Mark Morris Dance Group at Jacob’s Pillow, beginning with the wild storm that sent us all soaked into the theater. Peevish gods hovered, but puckish spirits triumphed. The Morris dancers are, as always, vibrant of expression, both physical and facial, and the four Morris dances are masterfully designed and giddily musical; three are accompanied live, as usual with this company, by skilled musicians.