Very often what appear as fragments in my dream journals are dreams in their entirety. as I have many, very short dreams, that I refer to image streams.
In fact, just this morning I had 15 of them in a period of about 50 minutes.
I've heard these kind of dreams called everything from lucid dreams, to marathon lucids, to WILDs, to lucid thoughts, but I usually refer to them as image streams because of their short duration, and count them as regular dreams instead of lucids or WILDs, even though I am awake while they are occuring.
They often start out while I am laying in bed trying to remember the last dream I had, which is what happened this morning, and often occur when I am hungry or need to go to the bathrrom, which possibly provides the slight discomfort I need to stay awake during them.
This morning, while laying in bed after having slept about 7 hours, and while trying to remember my last dream, I suddenly found myself riding in a car down a road when I heard a very loud bang come from a car parked on the side of the road. The loud bang not only startled me, but then started a stream of other similar short dreams where I was riding in car in some of them, hiking through a woods with a group of people in another one of them, in my house doing things in several others of them, and in a restaurant with a group of people singing happy birthday to some guy in another one, which one I have decided to count as a lucid since it was longer, and had so many more things happening in it than the other short dreams did.