When competing in an Olympic final, the last thing you'd want is a toilet crisis.
Well, spare a thought for French road walker Yohann Diniz, who appeared to poo himself during the 50km final, which is currently ongoing in the streets of Rio at the time of writing this article.
Diniz is a well-known figure in the 50km world. He is currently the world record holder with a time of 3:32:33, and is a three-time European Championships gold medal winner.
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He has won gold in 2006, 2010, and 2014, but his Olympic history is not as successful.
Back in Beijing, he didn't finish the race, and then four years later in London, he was disqualified, so he would have been hoping Rio 2016 would bring him better luck.
In 2008, Diniz couldn't finish the race because of suffering from stomach and thigh pains, and he was then punished by Olympic officials four years later in England for taking a bottle of water at the 38th-kilometer mark outside a zone provided for water replenishments.
However, his time at an Olympic Games has seemingly got worse because he has appeared to have a toilet crisis in the middle of the race.
A picture was tweeted out by @nick_pants showing a brown substance falling from Diniz's shorts and running down the back of his leg.
You can see the image below and can make up for yourselves whether or not he's had a bit of a crisis.
Sadly for the Frenchman, this happened just 49 minutes into the race, meaning that he could be forced to walk like that for another three hours.