Best known for their "Build Team" work on "Mythbusters," Kari Byron and Tory Belleci take their passion for adventure, science and travel to "Thrill Factor" to explore the adrenaline-junkie attraction of amusement park rides, waterslides and heart-pounding experiences. The co-hosts offer unique perspectives behind the engineering, physics and biomechanics that explain, for example, why drop rides are so thrilling. Whether they're jumping out of planes in Vegas or riding the world's first upside-down wooden roller coaster in Wisconsin, Byron and Belleci serve as test subjects as they strap into fast and frightening rides, collecting data behind the science of fun.