It's called dysphoric mania, AKA "mixed state."

"A dysphoric mania consists of a manic episode with depressive symptoms. Increased energy and some form of anger, from irritability to full blown rage, are the most common symptoms (MMDT). Symptoms may also include auditory hallucinations, confusion, insomnia, persecutory delusions, racing thoughts, restlessness, and suicidal ideation. Alcohol, drug abuse, and some antidepressant drugs may trigger dysphoric mania in susceptible individuals."

From the Wiki entry, which is probably ripped straight from the DSM-IV.

I always call it "energetically depressed" to my friends unfamiliar with psychobabble lingo.