This jaw-dropping incident captures a chaotic fight breaking out right in front of children at a Florida lake resort.

An argument escalated into a heated brawl, resulting in one man being knocked unconscious and needing CPR near Lake Winterset in Polk County.

In the dramatic video, about nine men in swim trunks are seen confronting each other on the grassy sandbar.

One individual delivers a massive punch to another man’s face, causing him to fall to the ground.

Various altercations ensue as pairs of men run and tumble across the area.

Forceful punches are thrown at faces, and some individuals grapple with each other on the ground.

The man initially knocked down staggers to his feet before being walloped again by the same puncher.

This time, he is out cold and stays down.

A woman in a pink bikini rushes out of the lake to attend to the casualty and begins giving CPR – though there’s no suggestion his heart had stopped.

Most of the group pull apart, though one sparring duo remain locked in a grapple.

Families including kids sit on their boats and watch the violence unfold, aghast.

Polk County Sheriff’s Office said they had arrested eight people – seven men and a 17-year-old boy – following the wild clash.

They confirmed that young children had been present.

Sheriff Grady Judd vowed he would make an example of the hooligans.

He said: “You can knucklebust and create brain injuries to each other on your own property without creating a disturbance to your neighbors.

“It’s over, folks. I think I’ve said that enough.

“The conduct is reprehensible and, obviously, you don’t believe us when we try to warn you.

“So you have unleashed the teeth of the dog, and now we’re going to start biting you, just like we bit these guys here.”

The Winterset Lake is often plagued by dodgy characters and criminality, according to the Sheriff.

In May, the Polk County Commission passed an order banning boaters from the shoreline at specific lakes – including the sandbar on Lake Winterset.

The motion is in the final stages of state approval but hasn’t come into effect yet.