WARNING: Distressing content
One moment they were dancing at a country music concert, they next they were fleeing for their lives from the worst mass shooting in US history.
Haunting videos captured the moment joy turned to bloody tragedy for thousands of music fans as they were cut down by volleys of machine gun fire in Las Vegas.
READ MORE: Live: Vegas massacre: 58 dead, 515 hurt in worst US shooting
The wounded were rushed to safety on office chairs, in wheelbarrows, and loaded into trucks and cars as the carnage unfolded.
Russell Bleck, who witnessed the attack on the Route 91 Music Festival, told how some people plugged bullet wounds with their fingers.
He told NBC News: "I saw a lot of ex-military jump into gear and start plugging bullet-holes with their fingers.
"While everyone else was crouching I saw police officers standing up as targets, just trying to direct people and tell them where to go.
"The amount of bravery I saw there, words can't describe what it was like."
READ MORE: Las Vegas shooting: Face of the gunman
Speaking about the moment gunman Stephen Paddock opened fire, he added: "He was just spraying the crowd, it was relentless, there was no stopping, maybe five or eight seconds to move from cover to cover to try and get out as he reloaded."
Police say at least 58 people died and more than 515 were injured after Paddock, 64, attacked concert-goers with an "arsenal" of weapons from a room inside the Mandalay Bay Hotel.
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