Hammer and Anvil (3.5e Maneuver)

''In a show of mercy, you widen your grip and push into your opponent, striking him with the flat of your blade. His own momentum followed by an instantaneous pause in movement causes him to jerk backwards, falling down in a most ignoble manner.''

Initiating this counter allows you to make a melee attack against one creature. If you wish, you may cut the damage dealt by this attack in half to force him to move 5 feet in a direction of your choice. If you use this counter on a target who is moving, they also automatically must make a Fortitude save (DC 14 + your Strength modifier) or be knocked prone.

You may even use this maneuver to attack a foe who is charging; if they are mounted and fail their save against becoming prone, they are automatically dismounted and both they and their mount fall prone.