I once received a minor concussion in an automobile accident. I was hospitalized overnight for observation and then released. A couple days or so later, I opened my mailbox and there was a pamphlet from the hospital telling me what to expect as a victim of a minor brain injury. One of the things it said was that I might experience feelings of déjà vu.

For some reason, the hospital actually mailed me two copies of that pamphlet, a day apart, and so when I opened the mailbox the next day, I did indeed get a feeling of déjà vu!