The world farting championships take place every 4 years in the appropriately-named town of Flatulence, Nebraska.
There are 3 solo competitions - Longest, Loudest and Smelliest - as well as an individual medley triathlon.
The competitors are required to move into the Fartympic Village two weeks beforehand and to ensure fairness, all must eat exactly the same diet.
Items such as cabbage, baked beans and pickled eggs are classed as performance-enhancing drugs, and are strictly banned.