DESTIN, FL (CNN) - Watching from their hotel balcony, a group of guys vacationing in Destin, Florida witnessed a hammerhead shark get uncomfortably close to some swimmers.
They yelled warnings, but it took a long time for their message to sink in.
They caught the whole thing on video.
And now they're getting a lot of attention on social media.
Ashley Rodrigue has the story.
What you're seeing is balcony-view video of a beach in Destin.
Behind the camera is a group of Slidell friends wrapping up a guys' weekend.
Matt Pecoraro, Witness: "My friend lost his keys and we were rummaging around the condo looking for his keys. Come to find out somebody bolted out the door and said, man, come see this hammerhead coming towards these people."
Despite the group's frantic warnings, laced with thick New Orleans accents, the swimmers don't react. The group gets more nervous as they watch the shark start to chase a stingray.
Patrick Trainor, Witness: "Once they're in a feeding frenzy or something, if you got close enough to those people, he was just going to bite what was near there, and that's when the yelling started."
"We were screaming down and they disregarded it, looked like, he threw his hands up like 'yeah right.' But when he finally figured out the shark was there it looked like he walked on water."
"It was like this is something that other people have to see. This is just crazy unbelievable, never seen anything like this before."
So the video was put on YouTube and Facebook last Sunday. Today, it's got more than 2 million hits, and the men have been contacted for interviews from as far as Australia.
"Top page of Yahoo yesterday, Inside Edition, it's incredible the hype we have. We never would have realized it would have happened."
"It makes me nervous, I've never had anything like this happen to me. It's kind of like winning the lottery."
And the group is making the most of their viral fame with t-shirts, a website and social media pages. But they're not just wanting to spread their story, they're also hoping to spread a very important message.
Scott McCain, Shot Video: "If somebody's screaming from the balcony, 'get out the water,' definitely get out the water. Definitely."
Ashley Rodrigue, eyewitness news.