From the article:
Whenever Harry La Fontaine drives away from his Florida home, heads turn, traffic stops, and people congregate to stare at his car. It's a remarkable vehicle, a long, black-and-gray, custom-built Lincoln limousine, which once starred in a gangster movie. But the onlookers' attention is drawn more to a one-wheel trailer behind the limousine.
With its odd array of pipes and cylinders, the trailer looks strange, but its purpose is practical: It converts wood into combustible vapor to fuel the limousine engine. La Fontaine has turned his Lincoln into a wood burner.