The attacker was detained by members of the public after threatening a security guard with a knife.
Local police scrambled to Morrisons Wilbraham Road before 1:30 PM, Tuesday afternoon.
Claire Bruchard who had been inside said:
"Within seconds of me shouting these seven men just ran straight to him - they were brilliant."
"The security guard was incredible and deserves a medal - he looked really shaken up once the guy was restrained," she added.
Sean Cummins, 41, who was in the fruit aisle ,said he heard a commotion coming from the other side of the store.
I was in the fruit aisle when I could hear a woman shouting.
It turned out she was shouting 'he has a knife' which if I had heard at the time I may not have rushed over to.
I turned my back and went running round and this guy was throwing punches at one or two men who were wrestling him to the ground.
A woman was on the phone to police whilst shouting out for more help so I went to go and help pin the guy down."