What did the Socs do when they jumped Ponyboy after he left the movie?

The Socs attacked, intimidated, and threatened Pony as he walked home from the movie.

From the text:

"Need a haircut, greaser?" The medium-sized blond pulled a knife out of his back pocket and flipped the blade open.
I finally thought of something to say. "No." I was backing up, away from that knife. Of course I backed right into one of them. They had me down in a second. They had my arms and legs pinned down and one of them was sitting on my chest with his knees on my elbows, and if you don't think that hurts, you're crazy. I could smell English Leather shaving lotion and stale tobacco, and I wondered foolishly if I would suffocate before they did anything. I was scared so bad I was wishing I would. I fought to get loose, and almost did for a second; then they tightened up on me and the one on my chest slugged me a couple of times. So I lay still, swearing at them between gasps. A blade was held against my throat.
"How'd you like that haircut to begin just below the chin?"
It occurred to me then that they could kill me. I went wild. I started screaming for Soda, Darry, anyone. Someone put his hand over my mouth, and I bit it as hard as I could, tasting the blood running through my teeth. I heard a muttered curse and got slugged again, and they were stuffing a handkerchief in my mouth. One of them kept saying, "Shut him up, for Pete's sake, shut him up!"