JACKSONVILLE, Fla. – Imagine running into a six-foot-long rattlesnake in an open field. Scary, right? But that's exactly what happened to a Jacksonville woman and friends in the Oakleaf area Sunday.

Lindsey Nilsen uploaded three images and a video clip of the eastern diamondback rattlesnake to Facebook about 11:30 a.m. Monday. The post has been shared nearly 44,000 times since then.

Q&A: What should you do if you run into a rattlesnake in the wild? Expert weighs in

"Ain't he a beaut!!" Nilsen wrote, adding that the sighting was made near Argyle Forest Boulevard and Branan Field Road.

RELATED: Florida fishermen surprised by massive great white shark | Florida man shares secrets for winning lottery jackpots | Florida woman attacks husband over missed anniversary

"That is a big [expletive] rattlesnake right there, dude," a man can be heard saying in the video clip. "... Oh my god, that [expletive] is like six foot."

The snake can be seen lingering near the person filming the encounter before slithering off into taller grass in the distance.