Jumping from a moving train

If you were to jump from a moving train at 20 km/h, would it be better to run in the direction of movement before jumping to maintain inertia or in the opposite direction of the train ?

• That depends on what your goal is. If you want to jump farther (and more dangerously), run with the train :) Commented Dec 17, 2015 at 13:59
• The goal is not to get hurt Commented Dec 17, 2015 at 14:03
• @tmwilson26 or if your goal is to land on a train next track over, then you want to move such that your sum velocity matches the target train :-) Commented Dec 17, 2015 at 14:41
• Jumping from a moving train is everyday-life? Commented Dec 17, 2015 at 18:52

How badly you hurt yourself will depend on the speed and direction with which you hit the ground. As you jump of the train your veloicty with respect to the ground will be $\vec v_{\mathrm{relative-ground}}=\vec v_{\mathrm{relative-train}}-\vec v_{\mathrm{train}}$. By matching you speed with the train (but in the reverse direction) you will just fall straight down when you exit the train.