User blog comment:DiegoAnime3000/A lot headcanons were confirmed today/@comment-10380701-20140829010025/@comment-3257939-20140829013511

Like I said, she needs a conduit. Pyrrha touched the water which covered all the sodas and that's how she was able to easily move that army of explosive canes. But when she raises Jaune's shield, she never touched it so there you have the explanation.