One Piece Chapter 30, page 7: GREAT!!!

To demonstrate their newfound, hypnotically induced strength, one of the pirates punches the solid rock cliffside. With a massive "DOGOH!" sound effect, the entire stone wall shatters into pieces. Nami screams, "NO WAY!? THEY WERE STILL SHAKY JUST A WHILE AGO!" Zoro is stunned, observing, "HE CRUSHED THE WALL... HOW DID THEY GAIN SO MUCH STRENGTH!?"