On July 24th 2010 a BBC camera crew arrived at Yorkshire Air Ambulance HQ to film the team as part of the Helicopter Heroes series.
Shortly before 7am, emergency medical dispatcher, Chris Solomons, arrived at work feeling unwell.
Chris's colleagues assessed him and it quickly became apparent he was suffering from a massive heart attack.
Within minutes Chris had gone into cardiac arrest and his colleagues and a cameraman immediately began the battle to save his life - using CPR and an AED.
Meanwhile, the cameras stayed rolling and captured this remarkable footage.
With thanks to the BBC and Chris Solomons.
Find out more at www.heartsandgoals.org
Read Chris's full story here bit.ly/YcTmE5