This movie was the first winner of Photoplay's Front-Cover Award for showcasing new talent.
The title was explained in a contemporary article in the Los Angeles Times as the sound a jockey hears from the crowd as he goes down the final stretch in a race.
The racetrack, Hollywood Park in Inglewood, is long gone. On its site now stands the brand new football venue, SoFi Stadium, of Los Angeles.
Five horses were needed for the role of one: the "main" horse, two stand-ins, and two "stunt" horses who could fall convincingly.