When our delivery driver Mark Birks heard an elderly customer calling for help when he knocked on his door to make his regular delivery he sprang into action to help him.
Fifty-seven-year-old Mark, who's worked at our Sheffield Chaucer Road store for the last three years, called the emergency services and then went to get a neighbour to see if they could get into the property.
They got inside and discovered that gentleman, who's 77, had been lying on the floor all night after feeling dizzy and collapsing.
Mark said: "The front door to his ground floor flat was unlocked but the security chain was on and I could see his feet on the floor. In the end I used a screwdriver to break the chain and the neighbour and I managed to get in.
"The gentleman had become dizzy and collapsed. He'd been there all night and was shaking. We got him a drink and covered him up to make sure he was warm and waited with him until the ambulance arrived, which wasn't too long.
"Adrenaline kicked in and I just did what I had to do. It was lucky that I called when I did as he could have laid there for perhaps days and the situation could have been much worse.
"I've been back to see him since and he's now on medication and is fine. He was very appreciative of what we did that day."
Mark's been nominated for an Asda service superstar award, and the store's online trading manager Spencer Parkes said: "We're all so proud of Mark – he's potentially saved someone's life.
"If he hadn't have called when he did who knows what may have happened.
"Mark's a lovely guy who builds up relationships with his customers and will do anything for anyone, so what he did is no surprise. To be fair, all our drivers here would have done the same too."