On the Indonesian island of Sumatra have been the annual race on bulls - Paku Jawi.
It is not only fun, but also the process of selling bulls. On race, traditionally held after the rice harvest in the fields, which are still full of liquid and dirt, sellers show what they are capable of bulls. Winner Paku Jawi be able to sell their animals at a premium price.
The best is the one who will be able to run on all straight to the intended target, while the rider must holding tails animals stand on miniature sled made of bamboo.