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The four-wide parade lap prior to Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Mark Funderburk photo)

Joey Saldana (12n) races Kyle Larson during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Mark Funderburk photo)

Daryn Pittman (83) fends off Donny Schatz during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Mark Funderburk photo)

Ian Madsen (5) battles Sheldon Haudenschild during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Mark Funderburk photo)

Kerry Madsen (2m) was one of several drivers who took wild rides during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Mark Funderburk photo)

Shane Golobic also went for a hard tumble during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Frank Smith photo)

Carson Macedo (2) battles Dominic Scelzi and Danny Dietrich (48) during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Frank Smith photo)

Aaron Reutzel (87) battles David Gravel (41) and Brian Brown during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Frank Smith photo)

Tim Kaeding (7xx), Rico Abreu (24) and Sheldon Haudenschild scramble during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Frank Smith photo)

Donny Schatz (15) and Brad Sweet (49) were among those involved in a surprising crash during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Frank Smith photo)

Donny Schatz (15) races David Gravel during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Paul Arch photo)

Shane Stewart wheeled this Blue Max throwback scheme during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Paul Arch photo)

Daryn Pittman (83), Brad Sweet (49) and Kyle Larson duel during Thursday's World of Outlaws NOS Energy Drink Sprint Car Series event at Knoxville Raceway. (Paul Arch photo)