With Vivi, Nami, and Zoro are almost petrified completely by the wax and Luffy is trapped by Miss Golden Week's power, Usopp is the only one left to save them all.
Did You Know?
Before Luffy begins his fight with Mr. 3 while he's encased in his armor, his shirt gets burned off. During the fight, immediately after Luffy's first failed Pistol attack against Mr. 3, Luffy snaps his arm back; you can see that he's still wearing his shirt. The fight then continues with him shirtless. See more