Meticulous professional or wild artist? Mountain biker Bjorn Riley is both.

Björn Riley is one of the most up-and-coming and technically refined riders on the World Cup circuit. The US biker from the Scott-Sram team masters his everyday sporting life with meticulous precision, quite unlike his leisure time. This is when the pro transforms into a free, wild artist. The short film "Dual Lines" reveals a unique perspective on Riley's worlds - on athleticism and artistic expression.