Directed by brothers Gabe and Benjamin Turner, the documentary “I Am Bolt” starts off with a bang. Opening with a montage featuring anthemic music while a narrator introduces a man with “physical strength and magnificent speed,” it could easily be mistaken for a superhero movie. As the title suggests however, the film’s subject is the aptly named Usain Bolt, a triple world record holder in track and field. In this engaging film, this extraordinary Jamaican athlete takes us through the trials, tribulations and triumphs of his journey ...