Any dancer will tell you that there's a special connection that forms during the run of a performance; the intimacy and trust are necessary for a dance ensemble to be successful. Now put a group of dancers in the Gerald D. Hines Waterwall Park and make them perform in the streaming fountain, and imagine the level of confidence they must have in each other. In "Natural Acts in Artificial Water," renowned choreographer Stephan Koplowitz and his initiative TaskForce created a masterful ensemble production based on the architecture, history, culture and ecology of the park, and the result was one of the most stunning collaborative dance performance pieces this year.