He does, with Nora as backup!

"...you might actually get the chance to break his legs, Nora. You just have to beat me to it," Jaune stated, taking a picture of the scene with his Scroll as he got up, sending the image to Goodwitch.

"Sweet!" Nora also got up, grinning sadistically. Jaune approached Cardin from behind, and tapped his shoulder. Cardin turned his head with a sneer... Which was immediately wiped from his face, courtesy of Jaune's fist.

He toppled out of his seat, which comically tipped onto him after as he laid, groaning in shock at the sucker punch. Two of his teammates shot to their feet, but Nora grabbed their shoulders and squeezed. "Now now, Jaune's just teaching your leader some manners... You guys could use a lesson too, so I suggest you sit down and watch~!" she chirped as Jaune made sure the Faunus girl was fine.

"You okay?" he asked her, and she blushed deep red.

"Erm, yes, thank you," she said, rubbing her bunny ears, wincing as she did. They were evidently rather sensitive.

"You son of a bitch! What the hell was that for!?" Cardin snarled, getting up and rubbing his face. "That hurt, asshole!"

"...so did you grabbing her ears," Jaune replied flatly.

"... you're mad about me messing around with an animal!?" Cardin growled, getting in Jaune's face.

"...I'm mad about you being a racist piece of shit," Jaune replied, putting his hand on Cardin's chest, and shoving him back. "And if anyone's an animal, it's the gorilla I'm looking at."

Cardin went red in the face and snarled, "I'm no damn ape!"

Jaune raised an eyebrow, and said, "Really? If it looks like an ape, sounds like an ape, has the intelligence of an ape, though I suspect I'm being generous, and acts like an ape..."

Cardin snarled and rushed right at Jaune, intent on shutting him up.