A baby being held in the arms of his stepfather was knocked out when a thug tried to hit the dad in the face and missed.
The tot was sent flying by the vicious punch and was thrown around like a rag doll - although his stepfather luckily managed to keep hold of him.
Shocking CCTV caught the moment the man squared up to the dad and then seconds later he takes a huge swing at him.
Amazingly police questioned the men involved - but no arrests have been made.
The punch was filmed in a supermarket in the city of Palmira, in western Argentina.
It begins with two men arguing in a shop aisle.
The man with his back to the camera has the baby in his arms and the other, sporting a wild hairdo, stands aggressively with hands on hips.