Thrill Factor

Tory and Kari are on a scientific quest to find out if there really is such a thing as an adrenaline junkie.

Tory & Kari set up shop trackside at Sonoma Raceway in Sonoma, CA, where Tory enrolls in racing school at Simraceway Performance Driving Center.

Kari heads to Wet 'N' Wild in Palm Springs, CA to learn the science behind waterslides.

Tory passes out while experiencing 8.5 times gravity in a stunt plane.

Tory and Kari compare the thrills of an Olympic bobsled to other thrills.

Kari and Tory travel across the US, exploring the fun of fear as they enter two of the country's most notorious haunted houses. Along the way, they examine the science behind some of the country's most epic fall traditions.