Many creative activities, such as painting, offer opportunities to express your feelings. For normal teens, those feelings may range from "hyper" to "blue" . . . sometimes even in the same day. A few people, however, have abnormal mood swings. On some days they may be depressed to the point of suicide. On other days they feel so overwhelmingly positive—actually invincible—that they may engage in behaviors, such as gambling, that can eventually have a negative impact on their lives.