Hidden Leaf Village Grand Sports Festival!

also known as Konoha Annual Sports Festival is the fourth Naruto OVA

Synopsis
The Rookie Nine plus Team Guy taking part in a sports competition in which the winning team gets one whole week off missions. Unfortunately Naruto, really needs to go to the bathroom, forcing him to make repeated dashes for the bathroom in between games, only to be foiled each time by one of the other ninja who are mostly unaware of his condition. In the end Naruto wins the relay race which wins Team 7 the vacation, only to be spoiled by Naruto releasing his bowels, much to everyone's disgust.

Trivia

 * Many seldom seen characters (at the time of release) can be spotted in the line for the mens bathroom including the Sound Four (excluding Tayuya), Haku, Inari, Waraji, Zōri, Tazuna, Gaara, Hayate Gekkō, Ebisu, Oboro, Kagari, Mubi, Itachi Uchiha and Kisame Hoshigaki.
 * During the second of Naruto's trips to the bathroom, the Fourth Hokage is seen walking in the hall.
 * During Naruto's second trip to the bathroom, after Minato Namikaze is seen, Team Baki are seen at the corner when Naruto turns.
 * Kakashi Hatake is seen reading the Icha Icha series during the second trip and gets bumped along the way.
 * Akamaru, Tonton, and Pakkun are seen hanging out when Naruto bumps into Team Asuma.
 * There is also another team besides Team Guy and the Rookie Nine teams participating.
 * Kabuto and Orochimaru were also seen.
 * The English dubbed version of this OVA wasn't shown on TV, only as an extra on a DVD.
 * Tenten was shown with a darker and longer outfit.
 * You can see the previous Ino-Shika-Chō in the hallway.
 * Minato is also seen in the background while Shino is dragging Naruto to the games from the restroom.
 * When he appears, Minato's arm appears over Chōza's body.
 * You can see Kurenai Yūhi talking alone with Asuma Sarutobi.
 * You can see Hayate Gekkō talking alone with Yūgao Uzuki.
 * There is the parody to "The Scream" by Edward Munk, after Naruto discovers, that toilet door was closed from inside by his clone.