This episode is the climax of one of the most iconic battles in the series: during the Chūnin Exam preliminaries.
Season 2, Episode 50 (based on certain streaming/home media orders). Sourced from the high-quality Blu-Ray release. 480p Naruto S02 E50 Blu-Ray - 480p - x264 - Tamil Telugu.mkv
Lee enters a state where his skin turns red and his speed becomes superhuman, allowing him to bypass Gaara's defenses and land the devastating Reverse Lotus . This episode is the climax of one of