James was collecting numerous vials now, and put them with the potion for his migraines so he could collect everything when he left. "Water, throw, reparo, throw again. That's fine. I can do that." He'd have to try with Sirius casting hexes as well. Precision was harder to reach while running and moving.
"Hell no," he answered without even thinking. "I'm happy with this, but you should have wanted it more."
A few words and he remembered why he didn't like Snape. He refrained from mentioning that he was not a boy nor did he point out that he didn't go around wanting to gut people. Instead, he squared his shoulders and concentrated.
He stared at the image, took his wand out and cast the hex, only to watch it fizzled it inflicting minimal damage. "Fuck." He spun on himself, pacing before returning where he was. "Why? I can cast the severing spells and I've killed animals. Why can't I cast this on an image? What am I doing wrong?" he asked while trying to suppress the anger in his voice, an anger directed at himself.