I did a chump race a couple of years ago at Sebring in a fox chassis mustang. My second stint was at night in steady rain after a several hour long red flag due to flooding from a pretty big storm. Needless to say I was a little nervous. I can't tell you how many cars went off but it had to be at least twenty.
One thing that surprised me was the painted start/finish line. At night in the rain you couldn't see it and when I'd drive across it the motor would instantly redline and the car would step sideways. This was about five seconds after I shifted to fifth (somewhere north of 100mph) and scared the hell out of me lol. I was real lucky that night. Great experience and I would love to do it again someday.

 

Ouch, glad the car is for the most part "OK". Weird spot to go around.