huh? She's still alive so at least she sucks at killing herself
There's an alternate scene. If you successfully keep Cid from dying, Celes never takes the "leap of faith" but instead is shown the raft by Cid. Getting this scene requires that you feed Cid more good fish than bad fish, and that you do it fast enough to overcome the timer that ticks away his health. The best fish move the fastest, thus the comment.