Vail firefighter and “Bachelorette” winner Ryan Sutter appears on a special 90-minute episode of “Fear Factor” with a handful of other reality stars tonight at 7 on NBC. Ryan’s wife, Trista, cheers for her husband, surprised to find she must face a challenge of her own. One stunt includes racing a car up and over another car as many times as possible before crashing, and another stunt involves attempting a horizontal rope crawl suspended under two helicopters hovering over Los Angeles Harbor. But the much-anticipated signature gross-out stunt gives the viewers what they want: seeing these personalities confronted with snakes and worms.