"We already learned it." In CLASS, didn't she remember? He already knew he could do it because he had done it in class. So why did he have to keep doing it over and over again when he wasn't even in class? Yeah sure practice makes perfect and whatever. But it was still homework. But Ellery did make a good point that it was still magic and it was cool. Well, it was just slowing things down it wasn't super cool.

"GO ELLERY!" YAY SHE DID IT! He raised both his hands in the air, slightly apart like he was holding imaginary pompoms. He could be a cheerleader for his sister.

Oh it was his turn again. This time the ball was high above his head and coming toward him. Olly held his wand up, right at the ball. "Arresto Momentum!" He watched as it began its descent, picking up speed, and then it slowed. It floated gently down toward the ground so Olly could easily reach up and grab it as it got near him. YES. He grinned at Ellery (but did not send her a thumbs up because both of his hands were full) and send the ball flying back in her direction.

You can do it, yes you can.