A mother went shopping after leaving her baby alone in a car with a note telling other carpark users to call her if there were any issues.
The woman was duly called by disbelieving passers-by, who waited next to the car until she returned.
The baby was left alone in a car in the carpark of Pak'nSave Porirua about 9am on Saturday.
A man said he spotted the baby after he and his family parked in the neighbouring space.
It was a shock to see the hand-written note resting on top of the baby's blanket, he said.
"It was written from the baby's perspective, and it said, 'My mum's in doing the shopping, call her if I need anything', and it had the cellphone number.
"We waited there for a little bit, wondering if the mum was just going to be two seconds and come back. And my wife said, 'I'm not going in without someone being here with the baby'."
Eventually another two passers-by waited by the car, with one of them phoning the mother and telling her to come outside.
"We had gone in [to the Pak'nSave] before the mother had come out because we had a baby ourselves that was in a hurry."
The man said the baby looked well-cared for.