One of the reasons why I posted my "Rainbow's Fall" dream yesterday is because I'm preparing a presentation for this Sunday on the topic at the local Pagan Pride Festival. Part of the focus will be on how to improve recall of your dreams. Among other things, don't drink caffiene or take any kind of sleep aid before bedtime. These usually interrupt dream sleep. I also suggest that people keep a small tape recorder by the bedside as a quick way to record dream images and impressions without the hassle of turning on a light to write by.
I'll also be talking about dream sleep disorders such as sleep paralysis, Narcolepsy, and REM without Atonia. And about hypnogogic and hypnopompic phenomena. Hypnogogic events are very sudden, dream-like incidents that happen as one is going to sleep, while hypnopompic events are similar things that happen as you come out of sleep. I've had a fair number of each experience, and I firmly believe that these and some other sleep state events can explain many cases of so-called astral projection, demonic or ghost contacts, and even alien abduction experiences.
In one of my hypnopompic experiences I witnessed a shape moving underneath the bed sheets and was grabbed around the wrist by it. Quite terrifying while it was occurring, though afterward all I could think was...cool!