Similar happened to my brother and myself once, we were travelling the scenic route home from Wexford when the car in front just swerved off the road, we stopped and went to see was the driver ok, it was long before satnavs, he had a map open over the wheel, it fluttered and made him move suddenly and turning the wheel, landing him into a ditch, we asked all the questions, "are you hurt?" can we contact anyone? he just said he was grand, he'll be ok until he contacts his parents and tells them he crashed the car, then they'll kill him. He was ok thankfully