Bre'oun Dance looks elastic. He moves from the ground to the air, dancing in between, in a matter of seconds. He stiffens his chest, pops it in and out, jerks it back. His arms swing like windmills.

CHESAPEAKE, Va. — On a peaceful afternoon in a suburban home garage, Demetrus Leslie, 17, jerked like he was dosed with strychnine. His arms lashed menacingly, then he dropped to the floor, only to ...

In a small Inglewood house near the end of a quiet, dead-end street, Marquisa “Miss Prissy” Gardner and Christopher “Lil’ C” Toler are mock arguing about a bag of Martha’s burritos he’s carrying. “You ...