On Sunday, Oct. 1, 2017, authorities report a lone gunman armed with multiple weapons broke out two windows of his hotel room located on the 32nd floor of the Mandalay Bay Resort and Casino on the Las Vegas Strip. Shortly after 10 p.m., he opened fire into an outdoor concert venue below.

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Law enforcement officials say 64-year-old Stephen Paddock sprayed multiple rounds of ammunition into an estimated crowd of 22,000 concertgoers. The event, which took place at the Las Vegas Village, was billed as the Route 91 Harvest Festival, and was in its third and final night.

With 58 festival attendees and the gunman confirmed dead, and nearly 500 more injured, the attack has been reported to be the deadliest mass shooting in modern U.S. history.

Speaking from her hospital bed in an interview with Dr. Phil, airing Friday, Diana Rapp says she was at the concert with a group of about 15 friends when “some man behind us said, ‘Oh, it’s fireworks look!’ And that’s when I turned around to look and see.” Emphasizing that she’d never before seen gunfire, Diana says she realized almost immediately, “those weren’t fireworks.”

Taking cover near some bleachers, Diana says she saw someone near her get shot, and ran out to help. That’s when she was trampled. “This girl just plowed me completely backward, and I fell back on the ground, so then I was – I was pretty much done.”

As Diana recovers from her injuries, she says she’s in shock and confused about what happened to her – and what she says she perceives happening in the world today. What’s the one thing this survivor says she wants most?

Dr. Phil’s special report, Aftermath Of An American Tragedy: Healing After The Horror In Vegas, airs Friday. 

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'It Sounded Like Firecrackers Going Off,' Says Survivor Of Mass Shooting