Numerous food trucks are parking on the street in front of the restaurant, stealing the customers.
Bob ends up winning the $1,000 prize before Linda accidentally lets the festival-goers in on one of the various lies.
A riot ensues, and the Belchers (and Randy) are forced to hide in their food truck.
After the festival-goers fall asleep, they manage to get away in the food truck before Randy starts the grill while driving, causing an explosion that forces everyone to walk back to town.
Most of the rest of the episode works, though not as well as normal.... After the highs of this second season, "Food Truckin'" is a mild disappointment.