Selphie's look of intense concentration as she danced had been more than a little frightening, really, but Zell had been too focused on his own arrows to worry too much about it - and then in the middle of a particularly uncomplicated series of steps she had unleashed her Limit Break, apparently unintentionally, and he did worry about that because it had somehow turned him into a frog, and it was seriously difficult to hit two arrows at once when you were a frog.