In the original Japanese version, Nami kicks Usopp into the water after stabbing him; however, in some international versions like the 4Kids dub, the blood was edited or removed.
Luffy, Sanji, and Yosaku finally reach the island with the help of the sea cow, Momoo, but their arrival is chaotic as their ship crashes into the forest, where they reunite with Zoro. One Piece Episode 33
After helping Zoro escape, Nami is accused of treason by Arlong's officers. To prove her allegiance, she stabs Usopp in the stomach, causing him to fall into the pool. In the original Japanese version, Nami kicks Usopp
Watch a breakdown and reaction to the shocking events of Nami's apparent betrayal in this episode: To prove her allegiance, she stabs Usopp in
This episode is highly regarded for its "shock value," setting up the emotional backstory for Nami that is fully revealed in the subsequent episodes.
Johnny, who witnessed Nami's actions from a distance, reports to the rest of the crew that Nami has murdered Usopp.