Had a decent run going and did all I could to get to the end.  Exhaust started coming in the car about mid-race.  Thought maybe just because I was maybe getting a cold.  Kept going to try get to the end.  Could barely hold on last ten laps...it was very apparent that the LR corner of the bumper was pushed into the muffler...which was half apart.  Exhaust was blocked and going everywhere but straight out back of car.  Think them EMTs were hoping to have left after races were over.  Didn't seem to care what I was telling them.  Oh well...imagine everyone re-acts a little different...hated to look like a baby.