A little boy was discovered crawling on a busy road in Ohio, USA, after his nine-year-old sister was asked to look after him.
The boy's mum apparently asked her daughter to take the baby downstairs and put him in a playpen, but instead she put him down on the sofa.
The 14-month-old toddler then spotted an open door and made a break for freedom, ending up in the middle of the road.
Motorist Rachel Downey was driving to work in the suburbs when she saw the boy. She slammed on the brakes and got out of the car to save him.
She told the Associated Press the toddler was "smack in the middle of the street".
South Euclid police Lt Jeff Meyers told WHIO-TV that as Downey carried the baby up his driveway his sister came running outside crying and saying that he was her brother.
Police said the baby's mum was "very upset" but the incident is under investigation and the case has been referred to social workers.
Apparently a construction worker had left the door of the house open.
This sounds like an unfortunate accident. It's not like the children were left home alone - their mother was in the house.
Neighbour Victoria Thomas said the incident could have happened to any parent and her neighbour was not a bad mother. She said: "If you're a parent, I'm sure it's happened to you before. I believe it was an accident."
Still, I'm not sure I would entrust a nine-year-old to make sure that a baby was in a safe place. I'm not certain I would ask a nine-year-old to carry a 14-month-old down the stairs, either.
What do you think? Was the mother seriously at fault here or is this something that could easily happen to any parent?