Yes, Carl's eyes were on the Ravenclaws. He had already been attacked by the blue team twice, failing to defend himself once. One more hit and he would have to leave his group. He did not want to do that! He noticed Jace firing paint at him and quickly turned to face him.

Pointing his wand at the boy, he said, "Protego!" A shield appeared and the blue blob of paint bounced off. Whew!