Later, Moore wanted to make the switch from ATVs to snowmobiles and Vaught helped him. A natural talent, it only took Moore two weeks to master a difficult backflip.
Moore honed his skills in Krum, a town about 5,000 people 50 miles northwest of Dallas that rarely sees snow. Instead, he worked on tricks by launching his sled into a foam pit. After a brief training run on snow ramps in Michigan, he was ready for his sport's biggest stage — the 2010 Winter X Games.
In that contest, Moore captured a bronze in freestyle and finished sixth in best trick. Two years later, his biography on ESPN said, "Caleb Moore has gone from 'beginner's luck' to 'serious threat.'"
That was hardly a surprise to Vaught, who said, "Whatever he wanted to do, he did it."
Vaught said Moore didn't believe his sport was too extreme, but rather "it was a lifestyle." He was good at it — along with ATV racing — as he accumulated a garage full of trophies.
Still, Moore's death is sure to ignite the debate over safety of the discipline. Whether action sports are too dangerous is an issue that's been raised before.
When freestyle skier Sarah Burke died in a training accident a little more than a year ago in Park City, Utah, there were questions about the halfpipe. Before that, the sport was examined when snowboarder Kevin Pearce suffered a severe brain injury in a fall in the same pipe as Burke two years earlier. Pearce has recovered and served as an analyst at Winter X.
But in general, the athletes accept the risks and defend their disciplines.
"I just look at it like this: Yes, we're in a dangerous sport," fellow snowmobile rider Levi LaVallee said. "Anytime you're doing a backflip on anything, it's dangerous. But we're training to do this. This is what we practice, what we do day in and day out. We're comfortable with doing this stuff."
LaVallee recently described Moore as a "fierce competitor."
"A very creative mind," LaVallee said. "I've watched him try some crazy, crazy tricks and some of them were successful, some of them not so much. But he was first guy to get back on a sled and go try it again. It shows a lot of heart."
X Games officials said in a statement that they would conduct a thorough review of freestyle snowmobiling events and adopt any appropriate changes.
"For 18 years, we have worked closely on safety issues with athletes, course designers and other experts. Still, when the world's best compete at the highest level in any sport, risks remain," they said, noting that Moore was hurt performing a move he had done several times before.