"No you're not," Sirius said, because it was an obvious lie and he wasn't going to act like it wasn't. He continued to follow her from a little below, so that if she fell he could — what? He didn't know the spell to stop her motion, so it wasn't like he could be particularly helpful. Maybe he could just yell loud enough that an older student would see her fall and stop her. Hm.
"You need to use your center of mass to swing the broom back up," Sirius pointed out, as if this was not a great issue to him, although he really didn't want to see her fall. "For what it's worth."
"You need to use your center of mass to swing the broom back up," Sirius pointed out, as if this was not a great issue to him, although he really didn't want to see her fall. "For what it's worth."