Naruto Episode 48
The next set of matchups is Rock Lee against Gaara. At first, Lee’s Strong Fist taijutsu is ineffective against Gaara’s wall of sand that automatically rises to protect him. Lee then removes the heavy leg weights he was wearing, drastically increasing his speed and allowing him to bypass Gaara’s defense. Lee then uses his Primary Lotus, but only succeeds in destroying a clone made of sand.
Source: Wikipedia
Naruto Episode 48 – Gaara vs. Rock Lee: The Power of Youth Explodes!
