Traces.The talented acrobats of Traces aren't dressed, Cirque-style, in masks or feathers; they're not working with artsy, enigmatic, mythical stories or cavorting in fairytale landscapes. They're just a group of folks in dull gray, brown and black street clothes. They share a little information about themselves, though not a lot, and if there's a story here, it's fairly undefined. For the most part, these seem to be kids hanging around on a street corner, dancing, jostling each other, fighting a bit; there's a screen behind them that sometimes flickers with black-and-white images and sometimes shows Chinese characters or drawings of skyscrapers, and the music ranges from pulse-pounding to old songs to soft, Erik Satie-like piano phrases, often produced by the multi-talented cast members themselves. But the real story lies in the acrobatics: someone skimming weightlessly up a pole, then stretching his body out in a true horizontal; actors leaping straight up from the ground and over each other's bodies; Florian Zumkehr doing impossible tricks with an ever-growing pile of chairs; the group at times using skateboards as bats, or making like Fred Astaire with his elegant cane. Presented by Denver Center Attractions through May 11, Stage Theatre, Denver Performing Arts Complex, 303-893-4100, www.denvercenter.org. Reviewed March 17.