Episode Summary from one piece wikia: Luffy, Zoro, Usopp, and Robin are standing near the dead dragon that Zoro killed and Luffy is trying to pull out the man who is stuck in the dragons body. Luffy succeeds in pulling out only the legs, making everyone think that he killed the man. The legs are revealed to be alive, making the whole group gawk at it. Robin points out that there is no trace of an upper body while Usopp states that he is quite tall. While the crew remains baffled, the legs start to attack them but promptly run away after the unknown Shichibukai.
Luffy is then seen calling to it to join his crew, causing Usopp to hit him on the head and telling him to stop it. Luffy runs after and launches himself at the legs, colliding with it and they both falls. The group is barbecuing and eating the dragon meat. Luffy asks Usopp what does one call someone like this and the latter replies that it is a centaur. It is revealed that the pair of legs is now stuck onto Luffy. Before he can do anything else, the legs lift Luffy up and piledrive him into the ground. Usopp tells Luffy that there must be an upper body in trouble somewhere but Luffy questions where is Usopps sense of adventure before stating that the legs were born like that.
He asks what name does the legs go by when it piledrive him again. Zoro calls to the others from atop a building. He points and the crew realizes they are standing right before a lake, beyond which is a mountain range covered in ice. Usopp and Robin realize that the distress call they received came from the cold side of the island. Luffy is excited by this and wants to eat shaved ice.