I had both visual and auditory hallucinations during my most recent manic episode. The music was like bits of classical tunes I've never heard before, played on piano and harp. It freaked me out because it was 3 AM and we don't live near enough to anyone that we could hear music from their houses, both our phones were off, and there were no radios playing.

Happened several times, too. It didn't help that I was totally paranoid at the time and not wanting to call my pdoc because I thought he'd put me in the hospital. I did end up calling the next day though because I was so manic that I was actually frightened. A couple days of Zyprexa fixed that, and three more weeks on it kept the weirdness away.