> Indeed. May I ask what kind of shape, colour, >speed, etc. these trail hallucinations took? I'm >keen on phenomena involving altered brain states.
>

Well, they were mostly the same color as the object that was producing them, but they had a sort of light-greenish tint to them. Like if I held my hand in front of my face and moved it around slowly, I saw a faint "trail" of afterimages of my hand flowing along behind it. Really freaky.

Also, towards the end of my 34 hours of wakefulness, I started seeing thigns out of the corner of my eye. I could have sworn I saw a cat sitting on the front lawn while I walked up the walkway, but when I looked, it wasn't there. I saw two lines in the road while driving home, too--the regular dashed white line in the middle, and another dashed white line, hovering about a foot above the real one. That's the one that really had me freaking, because all I wanted to do was get home before I got in an accident. Also, I thought I saw a giant standing on the side of the road when I turned up my road. It wasn't so much that I saw something there but the shadows gave me an impression and my addled brain ran with it.