Here's an incident that's trivial in itself, but suggestive.
Last night I had a vivid dream in which I was at a hotel spa. For some reason the treatment consisted of having dental paste shoved into my mouth. I hadn't expected this, and started to choke. Finally I had to spit out the paste.
Because the dream had some possible symbolic significance, I wrote it down when I got up, and even described it in an email to a friend.
Later in the day, I turned on the sitcom The King of Queens on TBS. In the episode, the lead character visits the dentist. The dentist unexpectedly pushes a dental-paste mold into the character's mouth, and he starts to choke on it. The choking scene plays out for more than a minute while other action is taking place in the background.
The parallel between the dream and the episode is pretty close. How often does the subject of choking on dental paste come up?
If this were the only premonitory dream I'd ever had, I might dismiss it as a coincidence. But I've had many others. The difference in this case is that I remembered to write it down, and I even shared it with a friend - before I saw the sitcom episode.
As I said, the premonition was trivial. But the implications aren't. If we can tune in to the future, even in inconsequential ways, when we are asleep and dreaming, then what is the relationship between the present and the future?
J.W. Dunne addresses the same issue in his 1927 book An Experiment with Time, which details the author's precognitive dreaming.