When Mrs. Henry Lafayette Dubose pushes Jem too far, he loses his mind a bit, destroying her flowers and breaking Scout's baton. What other rough thing does he do in that moment?

Jem commits a few acts that are uncharacteristic of him......

"He did not begin to calm down until he had cut the tops off every camellia bush Mrs. Dubose owned, until the ground was littered with green buds and leaves. He bent my baton against his knee, snapped it in two and threw it down. By that time I was shrieking. Jem yanked my hair, said he didn’t care, he’d do it again if he got a chance, and if I didn’t shut up he’d pull every hair out of my head. I didn’t shut up and he kicked me. I lost my balance and fell on my face. Jem picked me up roughly but looked like he was sorry. There was nothing to say."