I believe, because this happens to me. Sometimes, very rare though, I get a sort of screenshot in my sleep of something I was doing. For example, I dreamt I had built a huge structure in Minecraft, but I hadn't even started it in real life, nor even had any intention of doing so. I didn't know how or with whom I would build it. The day after I told my friend about that "dream" and he said it happens from time to time. Some days later I started a new project, not remembering the dream. Halfway through I noticed I was building the exact same building and was in the exact same stage of development as the structure in my dream! I was baffled since I didn't even think of that while thinking about my project, but my subconscious managed to find out what I was going to build...
...The wonders of the human brain...