Jon Benson had a lucky escape after he decided to use the toilet in a McDonald’s in Peterborough.
"As I came out everyone turned to look at me but no one spoke or approached me.
"I decided that I was going to leave but as I drove out I spoke to a member of staff who was putting cones across the car park entrance.
"She was terrified and shaking and told me that a guy with a shotgun had carried out an armed robbery."
He added: “I was in Peterborough on work. I have never visited the city before and thought I’d just freshen up and have a coffee before I went back home. It’s so weird and it’s my birthday.
"But it was a memorable day. I was driving up to Peterborough feeling a little disappointed that birthdays are a bit flat the older you get.
"At least I had a good story to tell my family over dinner."
Cambridgeshire Police confirmed to BuzzFeed two men had been arrested on suspicion of robbery and released on bail.