An Asda security guard filmed knocking out a man at the entrance to a store says he feared the alleged attacker was reaching for a knife.
CCTV footage shows Danny Anderson, 32, knocking a man to the floor as he walks towards him in Shoeburyness, Essex.
He then drags the man out of the store by his grey hoodie and dumps him outside the supermarket.
Mr Anderson, a father-of-three, says he feared for his safety at the time of the incident because the man had allegedly made threats to him, his colleagues and to customers.
He says he was prompted into swinging his fist when he saw the man reach for his pocket.
The security guard, who earns £9-per-hour working for Asda, told MailOnline: ‘As he was walking towards me he said he was going to stab me and then he put his hand in his pocket so I punched him.
'At that point he had already made three threats to life, including one to my colleague and another to customers.
'I really thought he was going to stab me because he went for his pocket. I didn’t know if he had a knife. At £9-an-hour I’m not going to take any chances with my life.'
Danny Anderson, a father-of-three, said he feared for his safety at the time because the man had allegedly made threats to colleagues and customers
Shocking video has emerged of the moment a man is knocked out with a single punch by a security guard in an Asda store. As the man in grey approaches, the man wearing a black jumper unleashes a right-handed jab, catching him in the face
Instantly stunned, the man falls straight to the floor as his knees buckle underneath him
The knocked-out man is then dragged by the hoodie and thrown outside the shop
As he's dragged away a phone that he appears to have been holding in his hand is dropped and falls on to the floor
Mr Anderson, who grew up in the town of Shoeburyness, said he had been working for Asda for the past year. He also works as a tree surgeon
'I've been in security for six years and I’ve never had anything like this. I’ve been on doors and sometimes you have to get physical, but it’s just drunken people,' he told MailOnline.