Other “weird-dream-that’s-not-quite-a-nightmare” I once had involved me being in a weird hallway that seemed suspiciously like a place I knew from school. I was a long long hallway with checkered floor, and the walls in the dream were white and pretty much like jkman’s, everything was dark-blue/purple-ish colored, as if there was a dark blue light on everything. (The white walls seemed blue-ish because of the weird light). There were no windows, but the light was all over, like some sort of weird night-vision thing.
On the walls of the long hallway (I couldn’t see it’s end) were some weird sliding doors. I kept walking through the hallway, and finally came across a pair of open doors (one on each side of the hallway) (Still couldn’t see the end). I couldn’t/didn’t see what was outside, but it was odd as some weird distorced musical instrument things entered floating slowly and wiggling, crossing from a door to the other. (Looked like some sax sort of stuff, a big violin/guitar thing, pretty much like a surreal painting). The things floated across the hallway in front of me, and in the end nothing was scary at all, but it felt weeeeeeeeeeeird when I woke up.