Kyle Larson, driver of car No. 32, and Brian Scott, driver of car No. 2, collide at the finish of the NASCAR Nationwide Series DRIVE4COPD 300 at Daytona International Speedway on Saturday, February 23 in Daytona Beach, Florida. Matthew Stockman/Getty Images

Larson's car went airborne after the initial impact. Jerry Markland/Getty Images

Larson's car then made impact with the fence separating the grandstand from the track, severing his engine from his vehicle. Chris Graythen/Getty Images

What was left of Larson's car then landed back onto the track. Jerry Markland/Getty Images

Larson and Regan Smith, in the No.7 car, slide across the track after the accident. Matthew Stockman/Getty Images

Larson looks at his car following the incident. Matthew Stockman/Getty Images

Medical officials remove an injured fan from the stands. Jonathan Ferrey/Getty Images

Larson's engine is seen smoking and burning behind the guard wall. Jonathan Ferrey/Getty Images

Medical personnel remove an injured fan from the stands. Jonathan Ferrey/Getty Images

Medical personnel assist fans sitting close to the wall as crews clean up debris. Jonathan Ferrey/Getty Images

Medical personnel assist fans. Matthew Stockman/Getty Images