I'd say the four-wheeler was drunk or distracted by phone/texting...
He was moving from lane to lane after he went by, got into the sweeping right-hander in the hammer lane, drifted into the slush/snow on the left shoulder, and that was all she wrote.
Side-swiped the end cap of the guard rail by the overhead sign post.
Then he headed towards oncoming traffic. (You can see oncoming traffic slow down)
From the rooster tail of snow, I'd say the driver hammered it as opposed to stomping on the binders.
Good move because slamming on the brakes would
have caused an uncontrollable spin on the snowy grass median...sending
him right into oncoming traffic.
It was a nice save...but it never should have happened.
That driver needs to buy many lottery tickets.