It was after 10pm on Sunday and Jason Aldean was coming to the end of his set at a country music extravaganza in Las Vegas.
Revellers heard what they thought were fireworks. It was only when people started dropping to the ground they realised it was something far more sinister.
Suddenly the music fell silent as Aldean and his crew rushed off stage. The noise of fear and pandemonium took over.
High above them, suspect Stephen Paddock, 64, was spraying bullets from the 32nd floor of the Mandalay Bay Hotel and Casino.
Mayhem ensued among the 22,000-strong crowd at Route 91 Harvest as they ran for cover or the exits.
Those at the edges of the crowd fled as quickly as they could, but many were trampled on or hurt jumping over fences while the shooting went on for some 10 minutes.
People sought refuge in cars, buses or just kept on running in the hope of surviving what would later become the US’ worst mass shooting.
Seventy-two minutes after the first 911 call, police stormed the luxury suite Paddock was staying in.
They found the suspect lying dead from a self-inflicted gunshot wound, surrounded by his arsenal, including 23 firearms.
Paddock has set up a number of cameras around his hotel suite and fitted so-called “bump-stocks” to 12 guns, allowing them to mimic fully automatic gunfire.
US officials have discounted a claim of responsibility by the Islamic State militant group.