He goes and picks up another tennis ball from a stolen pile of them, pulling his arm back and chucking it against the wall. As it bounces he whistles his arrow to do little loops around it, veering up and around it as it ricochets between wall and dummy bench.

This time he doesn't evaporate the ball, but he's not keeping his rings around it as tight as he wants them.

"Normally I got this down. Just gotta keep at it until I get all warmed up." He cricks his neck as if there's something physical to it, but for the arrow it's just mental. "What was you aimin' to do, should I get outa your way for a bit?"