In Antwerp , Belgium , early this year , Kathryn Bennetts , a former ballet mistress for Mr. Forsythe and now the director of the Royal Ballet of Flanders , revived this intricate patchwork of brilliant classical dancing , absurd antics and , in the work 's final section , quite possibly the best contemporary comment on the corps de ballet yet made : 38 dancers , identically costumed as schoolgirls , in a riotous and rigorous display of tribal dance .