Then, You Know, It Was a Deliberate Explosion

In order to get from boston to the airport, you had to drive through a callahan tunnel. The kis figured out as if you got the thing going fast enough into the tunnel, and you could coast on the momentum that the car had, they turned the ignition key off. And then after a certain amount of time, they would turn the key back on, and it would emit this tremendous explosion. They did it every day until they finally got caught.