A man was taken on a wild ride when his wheelchair became lodged in the grille of a semitrailer truck and was accidentally pushed down a highway for four miles (6.4 kilometers) at about 50 mph (80 kph), authorities said. The 21-year-old man, whose name was not released, was unharmed but was taken to a hospital as a precaution. He had been secured to his wheelchair by a seat belt. "The man spilled his soda pop, but he wasn't upset," said Sgt. Kathy Morton of the Michigan State Police.