Yes, I suppose if

  - after ignoring the persistent warning you had days in advance that the 12v is dying
  - you lose power in the exact few seconds between
    - first securing every vehicle door
    - and then proceeding to open any other door
  - and there's another passenger inside
  - and they are also incapable of operating a door

then you will have to either jump your 12v or otherwise somehow unlock your door. The odds are diminishingly small given all of those factors, but wait there's also more:

  - You don't have all the accidental 12v drains that happen in other vehicles (lights, accessories, etc... accidentally left running)
  - The 12v is constantly replenished from the main battery, rather than a more unreliable alternator

So, I suppose there's this and then there are also the odds that your passenger is immediately struck by lightning as they exit the vehicle. At least in the former unlikely scenario, emergency responders can help you out with relative ease and little harm.