Love it or hate it, Uber has become an integral part of the daily commute and nowhere is that more true than on the streets of San Francisco. Sometimes we forget that the people charged with shuttling riders about town are people themselves -- people with hopes and dreams, fears and foibles. This week in his mockumentary series On the Brink of Greatness, Steve Goldbloom examines the trials and tribulations that these unsung urban drivers experience every day.