Hyperactivity in ADHD is defined by excessive movement. Common behaviors include fidgeting, squirming, or leaving one's seat when expected to remain seated, such as in a classroom or restaurant. Children may frequently run about or climb on things. Impulsive behaviors include blurting out answers before a question is finished, having difficulty waiting for one's turn, and interrupting or intruding on others' conversations or activities. This pattern of behavior often results in the individual being perceived as noisy and boisterous.