The Sumatran sport of Pacu Jawi, or “Mud Cow Racing” is held in the beginning of each rice harvesting season in Minangkabau to bring fun and encouragement to the people. Between 500-700 cows are used for the event.
With their hands and feet occupied steering the cows, jockeys must bite the tails of the cows to make them go faster. It’s dirty, dangerous, and somewhat deranged, but it’s an event worth watching nonetheless.
Here’s the best video we could find. Low quality, but it does capture the event well enough.