"When I arrived on the scene, the fire was extending up the walls," Wood said. "I saw the tires on the truck blow up."
The fire badly damaged the three-car garage and a bridge between the buildings, and caused some damage to part of the two-story mansion.
Property records show the home is owned by Joseph M. Montrella, a stone mason who, neighbors said, built it in 2001.
The house, which has a turret, two brick chimneys, and ornate fireplaces, has an official estimated market value of $1.4 million and is surrounded by trees, landscaping, and a small brook.
Wood said Thursday the main part of the house suffered smoke damage but remained structurally sound.
Officials said the owner was taken to Crozer-Chester Medical Center, and added that he is expected to recover.
The truck appeared to be a customized "monster truck," Wood said.
Neighbor Ed Minto said that in addition to building his own home, Montrella did the masonry on at least one neighbor's house.
"He does incredible work," Minto said. "You should see the inside."
He said that Montrella is a friendly neighbor who often takes his two young sons on dirt-biking trips, and that he always makes them wear helmets and pads.
Minto said that Montrella and his female companion also have a German shepherd, which escaped the fire and was found safe at a neighbor's house.