Here's a hint: It doesn't end well for his truck.
Apdaly Lopez won the 2015 Baja 500, but before he crossed the finish line he had to contend with a spectator who was hell-bent on joining the race. The video here isn't the best quality, but you can clearly see the madness that unfolded. A spectator's truck gets in front of Lopez and won't move. Eventually the guy either gets clipped or loses control. His truck ends up on its side as Lopez speeds off. A crowd of people watching the race quickly come and help flip his truck over.
Lopez wasn't punished for the incident and by all accounts the doofus in the truck seems to be fine. Guys, leave the driving to the pros.