Known as "Happy" Kevin Harvick is one of the fiercest competitors in NASCAR history.

Harnessing his fiery passion for racing, Harvick has built a career that ranks among the alltime greats, but not without ruffling a few feathers along the way.

Joey Logano, Ryan Blaney, Chase Elliott, Denny Hamlin, Jimmie Johnson, Ty Dillon, Greg Biffle, and Tony Stewart sit down to unpack some of Harvick's most famous "happy" moments and give insight into how Happy's fiery side has helped him find success at the top level.