A final caution flag on lap 40 for Bloomquist , who slowed with a flat right - rear tire while running fourth and did n't return .
The blown rubber wrapped around Bloomquist 's car 's wheel .
A final caution flag on lap 40 for Bloomquist , who slowed with a flat right - rear tire while running fourth and did n't return because the blown rubber wrapped around his car 's wheel .