Well, I still woke up at 4 a.m., but I did remember a dream. I was telling somebody about a college class I once took, for which I had to write a computer simulation based on the old Traveller role-playing game. (And that was actually the assignment -- I didn't choose to make it about Traveller.)
To my surprise, the other person had just enrolled in the current version of the same class, and was very enthused about the fact that the Traveller simulation assignment was still on the syllabus. The dream ended with me offering to share an old novella I wrote based on my program, only to discover that I'd written a note on the last page of my manuscript that was innocent at the time but seemed highly embarrassing out of context.
As is usual with dreams, none of this seemed the least bit implausible while it was happening. I just thought it was marvelous fortune to run into someone else who enjoyed Traveller. Only with waking retrospect did I feel sorry for the hundreds or thousands of students who must have taken that professor's class over the decades without the benefit of having played Traveller beforehand.