“PARIS — After taking a few steps back to get a running start, Hadj Benhalima dashed toward the building, pushed against its wall with his foot, propelled himself upward and stretched out his arm.
At the peak of his leap, he flipped off a light switch, more than 10 feet off the ground. A click sound rang out, and the bright lights of a nearby barbershop went off instantly.
“Oooh,” his friends cheered, as Mr. Benhalima, a thin 21-year-old dressed all in black, landed back on the sidewalk. It was the second store sign he had turned off on a recent nighttime tour across Paris’s upscale neighborhoods. Many more would follow as he soared up and dropped back down across the city.”