1. You are alone in the elevator.
  2. You are handicapped with a disability that cannot be at least partially treated by light exercise.
  3. Somebody famous is getting on the elevator and you need to know what they smell like.
  4. You are carrying something that is both heavy enough AND large enough to require two hands.
  5. You are transporting something that has to be rolled or dragged AND that is not passed out drunk.