"Abnormal behavior during manic episodes includes:
- Flying suddenly from one idea to the next
- Rapid, "pressured" (uninterruptable), and loud speech
- Increased energy, with hyperactivity and a decreased need for sleep
- Inflated self-image
- Excessive spending
"Depressive episodes in bipolar disorder are similar to "regular" clinical depression, with depressed mood, loss of pleasure, low energy and activity, feelings of guilt or worthlessness, and thoughts of suicide. Depressive symptoms of bipolar disorder can last weeks or months, but rarely longer than one year."