Superglue box base to bridge. Apply duct tape to box lid, connecting Bungie cord to lid. Duct tape securely for strength. Attach Bungie cord to shoulders using a climbing harness. Jump in front of moving train, if alive, hold on tight. If dead,..... Assuming life remains, hold on to moving train. Bungie stretches....... Box lid opens in a furious explosion of cardboard and duct tape. [spoiler]or the superglued base tears away from the bridge, turning box into an elasticated missile homing in on the harness connected to me... Box hits me, and bursts open... my head.[/spoiler]