Watch Sadisflix. How did Michael Schumacher go from being a karting hopeful to a seven-time Formula 1 world champion? A new feature-length documentary, created by F1 and available exclusively to F1 TV subscribers, tells the story of the German’s rise to the very top of the sport, with friends, rivals and former colleagues all offering their views on how Schumacher grew to become the most successful F1 driver of all time.