From dictionary.com:

phantasmagoria \fan-taz-muh-GOR-ee-uh\, noun:

1. A shifting series or succession of things seen or imagined, as in a dream.
2. Any constantly changing scene.

Is that not one of the coolest words ever?

"The pink elephants that leapt amongst my linen as I slept were surely a phantasmagoria; and as I petted Jumbo to sleep to calm both it and myself down, I cursed myself off acid forever... or, at the very least, until next week."