CHICAGO (CBS) — A man from the Midwest who ran for his life when the shooting started tells WBBM he feels “blessed beyond measure.”

It was a surprise 40th birthday present from his wife: Ryan Burr of Eau Claire, Wisconsin, and his wife met two other couple in Las Vegas for the Jason Aldean concert.

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At first, Burr said it sounded like a helicopter overhead. Then, they knew it was gunfire.

“Bullets literally whizzing over our heads. I’ll never forget this: I could hear them – it sounded like they were going, from the back of my head and then it would go left and then right and then back to the left.

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“It was just apparent that everybody – everybody – was in the path. Because people were just getting hit directly.”

Burr said he and others tried to push down a wall – but could not. Finally, they got out.

“We approached a firetruck that had full-armed SWAT team members around it, and we basically just ran over to them with our arms up, saying, ‘Where do we go?'”

And soon, home to Wisconsin.

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“Can’t wait to hug my kids.”