It sounded like something out of a teen competition movie such as "Drumline" or "Bring it On." But the brawl that broke out Saturday night at McAdams Park following a spontaneous "dance-off" wasn't a movie scene, and police and city officials on Monday were sorting through the aftermath that left one person hurt and two others -- a mother and a son -- facing criminal charges. "This is a whole new arena" of crime, said Lt. Jeff Easter of the Wichita Police Department's gang and felony assault section. The Dancing Steppers, a local drill team, was practicing routines at McAdams...