I used to be a competitive swimmer for the Skagit Valley YMCA Chinooks.
In my short dream I am swimming near the floor of the pool, running my fingertips along the rough textured surface. There is no one in or near the pool I swim around "exploring" the pool I'm already familiar with. I can stay under indefinitely without needing air and I swim quickly and easily (as if I'm wearing fins). There are low spots near the six foot midsection and there are brown decaying Fall leaves gathered in those places. I swim down and touch the wet leaves.
Then I wake up.