The fan ran into the singer in front of the Loews Atlanta Hotel on Friday, and his Instagram photo with Rose has gone viral ahead of the launch of the reunited Guns N' Roses tour next month.

"I was waiting for my friends, and I saw him get out of the car," Guglielmo tells Rock 100.5 Atlanta's Bailey And Southside Show. "And [I saw] the aviator shades and the bandana, so I was, like, 'That kind of looks like Axl from a profile.' And then he turned, and I saw the forearm tattoo, and I'm, like, 'Holy sh**! That's Axl Rose.'

"First I said, 'Oh my God! Axl?'" he explained. "And he just turned toward me and he put his hand out. 'Yeah, man.' And I was, like, 'This is incredible to meet you.' 'Cause I'm in my young forties, and they were the first concert I'd ever seen. I mean, I rode a ten-speed bike to go buy 'Appetite For Destruction' when I was, like, fourteen years old. [I told him all that] and he's, like, 'That's great, man. That's so cool to hear.'"

Caught up in the unexpected moment, Guglielmo prepared to walk away as a thrilled fan when he realized he had an opportunity to document his chance meeting with the rocker.

"And then I turned away. And I was, like, 'Wait a second!'," he thought. "Cause I was a little starstruck. I realized I had my phone in my hand. And I'm, like, 'Axl, I don't mean to bug you, but can I get a picture?' And then his, I guess, friend took the picture, and he took a good one, and I put in on Instagram, and here we are."