1. Watching a holiday special TV episode out of season
  2. When my mom saw Mos Def in Topdog/Underdog on Broadway then bought one of his CDs and played it at home during dinner
  3. Jetlag
  4. Buildings (often hotels) with elevators on both sides of a hallway so you don't know which way to turn when you get out
  5. Acquaintance with a drastic haircut change
  6. Going to a new Trader Joe's with a different aisle configuration
  7. Four traffic lights and then a stop sign.
    Sometimes, I sit there, waiting for the sign to change to green.
    Suggested by @evan