If a model with this special rule charges into combat, it will gain the Knock to the Ground and Extra Attack bonuses (see page 62) as if it were Cavalry, with a couple of exceptions:
This model will Knock to the Ground any model that it Charges, including Cavalry or Monster models, with a lower Strength value than it, even if the charged model has a Strength of 6 or higher. The rider of a Cavalry model will automatically suffer the Knocked Flying result for its Thrown Rider test.
Additionally, this model will still get the Extra Attack bonus if it Charges, or is subsequently charged by, Cavalry or another model with this special rule.
If a model with this special rule is a Cavalry model, the mount will count as being In The Way of its rider, except that the rider will only be hit on a 5-6; a roll of 1-4 will hit the mount.