what happens when pony comes home after his curfew?

When Pony comes home after his curfew, he finds his brother, Darry sitting reading the newspaper, and before he knows it, Darry is yelling at him, questioning him as to where he'd been. Soda tried to stick up for him, but, for the first time ever, Darry yelled at Soda for trying to help his little brother. Darry ended up hit Pony so hard it knocked him against the door. Everyone went silent, and Pony ran out the door. It was the first time anyone in his family had even hit Pony.