Third Gear

Luffy's Third Gear technique is his second method of achieving enhanced stats. By apparently forcing the strength of his bones from his whole body to just on limb (he does this be pumping his chest rubber into his arms etc.)his limb becomes massive and his attacks are capable of KOing almost any foe in a single hit. While in Third Gear, Luffy's speed is depleted to almost nothing, this is most likely due to the fact that all of his strength is now in one massive limb. Luffy can transfer the effects of second gear to any part of his body to unleash "Humongous" attacks. The effects of Third Gear only last a few minutes, after which Luffy had backlash which makes him very small and weak with a funny, high pitched voice (And somehow his clothes also shrink). Luckily, this size only lasts for as long as he is in third gear, but even so, using this technique is very risky.