I've had a couple of dreams, years ago, in which a friend and I had accidentally killed someone, and we're desperately trying not to be discovered. I wonder if any of those occurred during the couple of years when I was keeping a dream journal.
I took a quick peak through some of that recently, just glanced over a couple of dreams, and the notes didn't bring back anything at all! The major ones, the epics, no problem. But the small stuff? Gone. Not so much as a mental image left. Of course, many dreams are gone within minutes or hours of waking up from them. But you'd think that reading a transcript would ring a bell, even after a fair amount of time.