Choreographers Todd Eckert and Nol Simonse look to physics and group dynamics for their seventh annual Shared Space concert. Eckert premieres Force Field, a piece that examines external ballistics as a metaphor for the trajectories of the individual human life and its random encounters with forces exerted by other bodies. "Often, before we ever reach our destination, our route becomes ever more circuitous and meandering," he explains. In contrast, Simonse's new work What's Important Is Not Always focuses on the relationships created by acting in groups, whether the sober protocols of business or the clandestine dealings of secret societies. A second piece by Simonse, Mistakes and Gifts, addresses the continued issue of AIDS from the perspective of a gay man. Though independent in background and process, the shared evening by the two choreographers has become a tradition in juxtaposition.