An older man in a suit is being wheeled on his wheelchair through a bookstore by a young man in a sweater .
The old man is running down the street .
An older man in a suit is being wheeled on his wheelchair through a bookstore by a young man in a sweater.
The old man is running down the street.
One cannot be running and be wheeled in a wheelchair simultaneously.
One can not be running and be wheeled in a wheelchair simultaneously .