So there's this episode in Naruto titled "Bikōchū Search Mission." Although the premise may have slipped my mind (it must have been 10 years since I saw this episode), the plot of this filler is pretty straightforward: find the Bikōchū to track Sasuke's scent. This mission took place during the time Sasuke left the village to become a self-centered emo.

The team assigned to this mission was Team Kurenai, with Naruto tagging along as the fourth member. Their goal was to find the elusive Bikōchū beetle, known for its tracking abilities. After some time, the team finally found the Bikōchū.

However, as fate would have it, Sasuke's headband fell into a pile of logs. As Naruto tried to retrieve it, he accidentally farted. The stench was so potent that everyone, including the bug, caught a whiff.

When Shino released the Bikōchū from its cage, instead of heading towards Sasuke's direction, it made a beeline straight for Naruto's butt.