One Piece Chapter 32, page 3-5: Grave Danger

Infuriated, Zoro lunges forward and slashes Sham across the chest, roaring, "DON'T TREAT OTHERS' KATANAS... WITH DISRESPECT!!" Sham, licking his claws, calmly says, "OKAY... NOW THAT'S BETTER..." right before the blade connects with a loud slash. Sham gasps, "AH!!?" as the strike lands.

Usopp cheers from the sidelines, "WOW, POWERFUL!!" while Buchi and the tall man in the top hat watch. Buchi declares, "IT'S MY TURN NOW...!!" However, Sham is shown bending completely backward, completely unharmed by the slash. He sneers, "DID YOU THINK YOU ACTUALLY CUT ME JUST NOW?" Zoro ignores him and runs past to retrieve his discarded katanas, muttering, "DAMN IT... HOW COULD HE TREAT MY KATANAS LIKE THIS!!" Sham's eyes widen as he prepares to counter.

Before Zoro can reach his swords, Sham leaps onto his back, pinning his arms and body. Sham laughs, "TOO BAD... I HAVE A VERY THIN WAIST!!" Zoro grunts in shock, "WHAT?!" Sham calls out, "GO, BUCHI!! IT'S YOUR TURN!!!" From the sidelines, Usopp is stunned by Sham's flexibility, exclaiming, "THAT GUY... HE'S ACTUALLY VERY THIN!!