We gave chase as Frank and the ball rolled through the parking lot, narrowly missing the inspector’s car. It spun past construction workers, who looked up from their shovels and heavy machinery to see a man bouncing around inside what appeared to be a diving bell. It cleared a small hill, briefly going airborne, then zipped right across Route 94, the two-lane road splitting the park. Cars honked and slammed on their brakes. If there had been opposing traffic, Frank would have become part of a real-life game of Pong, volleying from one bumper to another.