With Roberts on lap 109, the car driven by Bob Swanson lost control and went sideways. Roberts' car contacted Swanson's, causing Swanson's car to eject Swanson, flip over, and catch fire, while Roberts' car went through the outer wall. Attempting to avoid the accident, Chet Miller swerved into the debris field.
On lap 109, as Roberts was in the lead, Bob Swanson's car lost control and veered off course. This incident resulted in Swanson's vehicle ejecting him, flipping over, catching fire, while Roberts' car passed through the outer wall. Chet Miller attempted to avoid the accident by swerving into the debris field.