Maybe it was a little babyish, but Billy screamed when the demon threw his brother. Well. He had said to let him go, he didn't say how? Probably not the point.
Instinctively, he moved in front of Tommy. His brother might be incredibly powered, but he was also super injured.
Mom was going to kill them.
"Are you okay to get us out of here?" Billy asked in a quiet voice, hoping the gross creature couldn't hear whispers. Before even confirming an answer, he pictured a song in his head. He hadn't gotten to see the magic Wanda had used to help America, but maybe he could do his own. Humming the song softly, he lifted a hand, sending the song out into the hallway, the sound waves circling around them.
It took a moment, but the Demon stopped snarling and didn't advance any closer. "Come on, we've got to go." Billy reached out to support Tommy. If they had to do this the old-fashioned way, his brother was going to need help to get away quickly.