'Pushing the boundaries' is always risky, because those boundaries often enclose what works well. Venturing beyond them requires inventing new ways of realizing an artistic vision, and Hubbard Street Dance Chicago's Fall Series presentation of Peter Chu's Space, In Perspective was full of hazards. But what Peter Chu and Glenn Edgerton accomplished was something to see, as they quite literally wove new perspectives of dance into, around, and on top of a very different kind of dance concert.