Obito, Sasuke, and Sakura arrive on elevated structure.
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Sasuke jumps off elevated structure.
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Obito and Sakura are still on elevated structure which looks flat due to the panel angle.
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Obito jumps off the freaking structure and races over to save Naruto.
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Either Kishimoto accidentally drew the downed Naruto and Sasuke twice in this panel or we got two mystery men revealed there which are both Tobidara's Paths.
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This leaves Sakura still on the structure to witness the death of Obito from afar. Now shut up, pay attention to the manga, and stop reaching for evidence on a conclusion you have already convinced yourself into.