There is no beginning or end to dance, veteran choreographer and dancer Deborah Hay reminds us. As the sellout crowd milled in the lit cavern of Danspace, she quietly entered and began to move. This almost-70 year-old icon of American dance moved with the ease and certainty of a dancer who continues to bend her body to her will. Late in the dance, from a prone position, she lifted her left leg, slightly. As we watched, it rose. And rose. And rose, to an impressive 120 degree angle. Then she rested her forearm on the floor, cheek resting on her upraised hand, and hung out in that position as the audience giggled in the wonder of a body so attuned and still so able.