Arie's supreme act of violence

After lots of  yelling and threats and shouting from his room, Arie finally settled down and I went upstairs to tell him his time out was over.  He was kneeling in front of his bookcase, putting CDs back on the shelf.

"I'm putting the CDs back," he told me, with an air of anger in his voice.

"Oh," I said.  "That's good."

"Yeah," he sneered.  "But I switched all the CDs so they're in the wrong cases!"