WARNING: Explicit content.
Italy's Alberto Nonino suffered a nightmare wardrobe malfunction at the U20s World Championships, where his genitalia fell out of his shorts.
The decathlete was competing in the 400m event at the end of the first day of competition in Cali, Colombia, when disaster struck.
The 18-year-old started well out of the blocks, but he was soon seen repeatedly reaching towards his crotch instead of swinging his arms as he ran down the home straight.
Eagle-eyed viewers spotted the unfortunate reason Nonino's run was compromised, with him trying to contain his thunder as it repeatedly fell out during the race.