A man impaled by a tree stump at Michigan State University was stranded for 14 hours before being rescued by a group of runners, according to a report.

The unidentified victim somehow fell from a tree near a campus running trail at about 6 p.m. Friday, landing on a 2-inch wide stump, according to the Lansing State Journal.

The stump penetrated the man’s shoulder, exposing a bone, runners who came to the man’s aid about 8 a.m. the next morning told the paper.

“Basically a chunk of tree was sticking through his shoulder. He was laying on his stomach,” said runner Chris Smith.

Another runner, Victoria Mikko, a medical assistant who helped the victim until medical personnel arrived.

“He was pretty rough[ed] up. He had a big hole in his arm. You could see the bone,” she said.

When one of Smith’s friends asked the man why he had climbed the tree, he responded, “Enjoying nature.”

The man was taken to a nearby hospital.