Well, after much foraging around visionary artist's sites and sitting all of the way through through 'Enter the Void' I found something which really, really looks like the beginning of a typical hyperspace experience. And it's on a lampshade.
Ok, so suspend your disbelief. Imagine this in red, green or blue and black or white and constantly pulsing and changing at warp speed. It usually lasts about a second and then suddenly I pass through or shapes/entities start to extrude out of it and animate around me. This occupies my entire visual field so to speak (my eyes are closed).
I imagine this is what is often referred to as the chrysanthemum a la Terence McKenna.
But then again maybe not, I'd be interested to know if this rings any bells with anyone, or whether they think the chrysanthemum is something different.
http://www.habitat.co.uk.../Medium-lampshade/965702 thanks,
Majapanix