When trying to fall asleep, I get colorful mosaic-type visualizations, not really kaleidoscopic but in a similar vein.

My first striking experience of hallucination wasn't mine--my cousin and I were keeping an eye on her father and a very young relative, and her father told the little boy to gather up the toys he'd left under the table. There were some; when he was directed in some detail to get the frog he'd missed, however, we blinked. At the time my uncle was fairly heavily medicated for complications from Parkinson's (and in his seventies), but he'd seemed lucid till then. Afterwards his physical decline sped up, too.