Two or three weeks ago I started having these miniature, weird hallucinations. None of them last more than two or three seconds. First, I smell something yucky. Not the same every time, but all yucky. That's the strongest part. At the same time, absolutely simultaneously but weaker, a picture of a different landscape (different every time) and a noise. Just a flash of all of those together, for, as I said, no longer than two or three seconds. Brain cancer? Stroke? They just come out of the blue, without any identifiable cause or association. Not only have I never had anything like this before, I've never even heard or read of such a thing. If you have any ideas as to what words I should use for a search, please let me know. Take care!