Where there is smoke, there is fire.
The Daytona 500 had to stop during a red flag with 40 laps remaining after Juan Pablo Montoya's car crashed into a jet dryer on the track during a caution flag. Following the crash, the fuel spilled onto the track and set ablaze.
The events to follow may be even more epic than the incident itself. Impending rain and tweeting from the track made the event one of the most memorable in Daytona 500 history.
Here are three unintended lessons learned Monday night.