Not all stressful experiences are harmful. Scientists use the term eustress to describe positive stress. Situations that can produce eustress include riding a roller coaster, successfully completing an activity or passing a driving test. Negative stress is sometimes called distress with is produced by situations that cause worry, sorrow, anger or pain. A situation that causes eustress for one person may cause distress for another. For example, an outgoing person may look forward to attending a social event; whereas a shy person might dread the same situation.