“Stomp” returns with a mighty bang, bringing Justin Myles, the guru of masterful moves, back to his hometown. The worldwide hit that originated with street performers in the U.K. has continually evolved over the past 15 years with chin-dropping routines to alarm parents of active, inquisitive children. But it’s all in good fun. Myles, a native of Silver Spring and graduate of his mother’s Gracie’s Guys and Gals Dance Studio in Mechanicsville, Md., spent his childhood learning every dance step in the books and performing in all the Beltway Plaza Christmas shows. He added guitar, drums, bass and piano to his repertoire before attending Point Park University in Pittsburgh, where he majored in ballet and jazz and put together a band.