One time I dreamed that someone replied to a post of mine in the LÖVE Forums about coroutines and setmetatable. The fun thing is that I really did make a post asking about those, and in my dream the reply even had [in-dream] plausible code examples as to what one of those did (I think it was setmetatable).
In fact, the dream was so convincing (especially the code example) that I had to go back to that forum to make sure it was a dream :P
once on a programming help forum or something alike, someone actually answered my question instead of suggesting something completely different and calling you out as rude cause u said thats not what you were asking for.
I had a dream where I was in a cave killing skeletons with a katana. As it turns out, katanas are an awful weapon to fight skeletons with, because it quickly broke. I got another one off a skeleton that was dual wielding them, though.