Passage 1

One October morning in 2012, Paul Horton, a 59-year-old retired mechanical engineer and a keen outdoorsman, climbed onto his mountain bike and took off through his neighborhood near Lake Travis. Yogi, a six-year-old well-trained dog, came along. Yogi had done it every morning for nearly three years, happily beside his master. The two-mile route wound through hilly rural roads to a narrow, forested path. Shortly after turning around to go home, Horton approached a nine-inch-tall raised stone edge where the path met the sidewalk. He had jumped the edge dozens of times before, but on this morning somehow he didn’t get enough height, and the bike’s front wheel ran into the edge hard and twisted sharply. Horton, who wasn’t wearing a helmet, flew over the handlebars, hitting headfirst into the sidewalk. He was knocked unconscious. When he came to, he found himself lying on the ground half a mile from home.

By Horton’s side was Yogi, anxious to continue the trip home. As Horton tried to rise, he realized he could not feel anything below his chest, and blood began to fill his mouth. Horton whispered ，“Go home. Go get Shearon.” Horton spoke the phrase slowly, again and again, words he knew the dog would understand. “Go get” was a familiar command. Shearon was the name of Horton’s wife. For about 45 minutes, Yogi refused to leave his companion’s side. Horton continued commanding Yogi to go. Finally, the dog ran away.

That morning, Bruce and Maggie Tate, two of Horton’s neighbors, were on a walk in the area when theyspotted Yogi running down the street, which they found strange. They knew him as a calm and obedient （顺从的）dog. He darted (飞奔）toward them, then away seeming to beg for their attention. When they followed, Yogi dashed off, leading them somewhere, it seemed.

The wait was a serious pain for Horton. He lost track of time, and it became hard to breathe. Then Horton heard the faint sound of a dog barking. Yogi ran toward him. The Tates, who were right behind him, saw Horton’s condition and called for help. Horton was rushed to St. David’s Round Rock Medical Center, where doctors did what they could to mend his damaged backbone. Soon after, Horton was sent to St. David’s Rehabilitation Hospital. His first two visitors? Shearon and Yogi.

What do we know about Paul Horton?