Brian Nuttall was out for a walk on a breezy Oct. 30 in Apple River, Cumberland County, when he came across an unusual sight and pulled out his cellphone.
In the video, the forest floor heaves like it is breathing. The video has garnered more than three million views from online spectators.
However, what's really going on is less mystical — but no less dramatic. Tree roots, spread out wide underneath the forest floor have detached from their moorings. The root systems heave under the ground when the trees are caught by wind, making them appear to "breathe."