More on KentOnline
Staff performed CPR on a customer who collapsed in the restaurant area of Tesco, Sheerness.
The man, who is in his 50s, was taken ill with a suspected heart attack this morning while visiting the Bridge Road supermarket.
Three ambulances were joined by police and the air ambulance after they were called at 11.30am.
Scroll down for video
The helicopter landed in nearby Beachfields Park from where a doctor walked to the scene.
The medics were seen treating the patient at the back of the store where Tesco vans are parked.
VIDEO: Air ambulance called to emergency at Tesco, Sheerness
He was then transported around to Beachfields and flown away to King's College Hospital for further treatment, where he is currently in a serious condition.