1. Candle blows out
  2. Your dog is barking.
  3. Basement door closes
  4. Clouds cover the moon super fast
  5. Street lamp goes out right after your car doesn't start
  6. A stranger offers help with anything
  7. The lights don't work in your Uncle's old cabin
  8. Flat tire in Nevada
  9. Lots of crows
  10. Someone has just said "What could go wrong?" or "This is going to be a summer we'll never forget"
    Suggested by @Debby