Teens perform gravity-defying dance moves on New York 's subway . Score: 6 Make name for themselves off trains , appearing in music clips , docos . Mixed reactions from public , from heartfelt applause to fears over danger .
Teens perform gravity-defying dance moves on New York 's subway . Talented buskers earn hundreds of dollars from high-energy shows . Make name for themselves off trains , appearing in music clips , docos . Mixed reactions from public , from heartfelt applause to fears over danger .