There were 135 runners from South Carolina registered to run in Monday's Boston Marathon.
So far, no reports that any of them were seriously injured when two explosions occurred near the finish line.
Demi Clark from Fort Mill was just crossing that line when the first explosion happened near Copley Square.
She told Charlotte TV station WCNC she was searching out her family in the viewing stands when she heard what sounded like a cannon firing.
“I had moved over to the right so I could wave to my family. Thank God, because the runners to my left were all down on the ground and people were just blown up against the fences,” Clark said.
“And it was horrible. I mean, blood everywhere and nobody knew what to do. Chaos. Just absolute chaos. Smoke everywhere. And then another blast went off.”
Clark was among a wave of runners who hit the finish line about four hours into the race.
She was participating with a group of runners from Dream Big, a foundation that helps low-income youngsters take part in sports.
“Friends were on the course behind me,” she said. “I hope they're all OK. I did this with charity so I hope all my other runner friends finished.
"But...just so horrific. I mean, just so many ambulances there and...I don't know who would do this. I really don't. But they went for the most impact, for sure.”
Seven undergraduate and two graduate students from the University of South Carolina's athletic training program were at the marathon's medical tents to gain experience in helping fatigued runners.
Some of the students ended up assisting those injured in the explosions.
USC says none of those students was hurt by the blasts.
(Photo courtesy of Fox News)