Dean F. Biggs, Jr., age 19, was headed north, lost control on a curve, causing the bike to skid on its side, a trooper said.

Joseph Sefsick, Jr., age 72, of Adena, Ohio, witnessed Biggs lose control and was able to stop before the bike came to a rest under the front end of his Chevy.

Biggs was not wearing a helmet when his head then struck a fence post, authorities added.

He was not coherent when taken to Wheeling Medical Park, the trooper said. His condition is not known.