While in the train tracks on Tyro Station, you can normally get out by climbing up--provided the wall is not blocked. If you go into cover, click the Right analog-stick to crouch, and press Up + A behind a wall blocked by sandbags, you can climb through them. This allows for a rapid escape from the oncoming train and to catch opponents off guard. Note: A great place to test this is near the middle of the tracks where there is a structure with the small roof with the sandbags between the two pillars. There is one on both sides.