Passengers get a free ride. Drivers get a passport to the HOV lane. Nobody pays, nobody talks. On “slugging,” the DIY commuter system in D.C. that’s being used by 10,000 people a day and taking thousands of cars off the road.

The story of a deadly collision on the D.C. Metro, told from surviving passengers’ point of view.

What happens to a subway operator after someone commits suicide by jumping in front of his train?