A long while.
About 125 miles and one country later, just over the French border into Belgium, his car finally sputtered dry and crashed into a ditch. Which actually seems like a rather unnecessary ending after you've already managed to safely avoid tragedy while traversing the entire northern coast of France.
"Welp, might as well dump this thing into a hole."
Lecerf later recounted the seemingly endless horror to the Le Courrier Picard newspaper, describing his emotions during the harrowing journey.
"My life flashed before me," he said. "I just wanted it to stop."
And so it did. Amazingly without any casualties. Though the UK's Guardian newspaper reports that while Lecerf wasn't injured, he did suffer two epileptic seizures.
Not that we're keeping score, but surely that ought to count.
Regardless, everything more or less worked out in the end with his strict adherence to the most basic rule of driving: Make the tires maintain contact with the road.
And sometimes, just for fun ... with a ditch in Belgium.