If you move 30 squares or more in a single turn (whether deliberately running, or falling, or being thrown, etc.), you add +1 to your Target score. Every additional 30 squares after that you move in the same turn adds a cumulative +1.
A melee attack made against or by an extremely fast-moving creature can deal extra damage. Such an attack, if the GM deems it appropriate, deals its normal weapon damage +1 per 5 squares/second that the fastest-moving creature is moving at. Squares use the scale of the creature taking damage. For example, a human with strength 3 normally deals 1d8+3 damage with an arming sword. However, from the back of a charging mount moving at 18m/s against a stationary human deals an additional +3 damage (18m divided by 5 1m squares rounds down to 3).
For high-speed collisions, see “Falling and Collisions,” below.