In "West," their epic-scale and near-epic-length new show at On the Boards, the video wizardry of "Awesome" (always in quotes) has taken a quantum leap. The white silhouette of a galloping horse ripples across a rugged backdrop. A night-sky is unveiled inside a packing crate. Trickles of blood drip down from where you least expect them. These fancy flourishes are all part of a dreamlike meditation on the myths and transformations of the American West that's both ambitious and ambiguous. It's served up with music, movement and a whole array of stage trickery that keeps things lively, or at least trance-inducing, even when the show is nonlinear to the point of being cryptic.