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A shocking video demonstrating the power of Alaska's deadly mud flats has gone viral online months after Zachary Porter, 20, drowned at Turnagain Arm.
The alarming footage shows how quickly the black veiny mud flats in Anchorage, Alaska can swallow up a five pound rock.
In the video content creator Darren Ak throws a five pound rock into the mud to show how disturbingly quickly it would be consumed.
As soon as the rock hits the quicksand-like silt it begins to disappear from view as water seeps up around its edges.
Within a matter of seconds the rock is no longer visible.
As soon as the rock hits the quicksand-like silt it begins to disappear from view as water seeps up around its edges
Zachary Porter, 20, a college student from Lake Bluff, Illinois, was visiting Turnagain Arm with friends in May
'This is where tourists, people, they die in mud flats because of this' Ak explains on the video posted to his Tiktok account.
'It will suck you up' he cautions.
It comes just months after a 20-year-old man drowned in Alaska's famous Turnagain Arm mud flat.
Zachary Porter, a college student from Lake Bluff, Illinois, was visiting the tourist attraction with friends in May.
Tragically Porter became stuck in the glacial estuary and despite the best efforts of his friends and firefighters he drowned. His body was not recovered until the next morning.
On May 21, Porter and his friends were walking along the Turnagain Arm mud flats near Hope, a small community of about 80 people, an hour-and-a-half drive from Anchorage.
The group were between 50 and 100 feet from shore when Porter became stuck in the softening silt, Girdwood Fire Chief Michelle Weston told Anchorage Daily News.
State Troopers said one of his friends called 911 immediately after he became stuck, at around 5.45pm. When the first rescue teams arrived soon after 6pm Porter was waist-deep in mud.
Turnagain Arm The 77km estuary, carved out by glaciers, has one of the fastest incoming tides in the world
Tragically Porter became stuck in the glacial estuary and despite the best efforts of his friends and firefighters he drowned
On May 21, Porter and his friends were walking along the Turnagain Arm mud flats near Hope, a small community of about 80 people. Pictured is a view of the small town
Girdwood fire crews and two air ambulances were called to assist local responders at 6.13 pm, said Weston, but when Girdwood crews made it to the scene at around 7pm Porter was already underwater.
One man who tried to save Porter was flown to Anchorage with hypothermia, troopers said.
The fire department is around 47 miles from where Porter became stuck and Weston said it can take up to an hour to drive there.
The 77km estuary, carved out by glaciers, has one of the fastest incoming tides in the world.
Porter's father, Todd Porter, paid tribute to his son saying he loved travel and the outdoors.
'They were just going to have a little adventure before their summer activities started,' he told NBC Chicago.
Alaska officials believe Porter is the first victim the mud flats have claimed in decades.
'It’s big, it’s amazing, it’s beautiful, and it’s overwhelming,' Kristy Peterson, lead EMT with the Hope-Sunrise Volunteer Fire Department, told the Associated Press.
'But you have to remember that it’s Mother Nature, and she has no mercy for humanity.'
The last known death at Turnagain Arm was newlywed Adeana Dickison who drowned when her ATV got stuck in the mud and she got out to try and push it, only to fund herself trapped as well.
