Two Germans were hospitalized after a battle in which the weapons were salamis and Parmesan cheese.
He clubbed the younger man with a salami as his mother tried to fend him off with a sharp 4lbs piece of Parmesan.
The pensioner then pushed the woman down on to a glass countertop on which she cracked her head.
Police arrived to break up the melee. Two of those involved were treated in hospital for minor injuries.
The trolley was undamaged.
Details at the Telegraph. Photo: Getty Images.