Unhorse

A mounted enemy can be knocked off his steed by a number of methods. Whenever a character is in danger of falling off his horse, he must roll a successful riding proficiency check to remain in the saddle. If he fails, he's considered to be Knockeddown down and is lying Prone on the ground. Some ways to unhorse a mounted character include:

• Knockdown: Striking a mounted character or the mount hard enough to create a Knock chance
• Damage: Striking a mounted character for 10 or more hit points of damage.
• Pull/Trip: Hitting a mounted character or the mount itself with a Pull/Trip attack
• Overbearing: Successfully grappling a mounted character with an Overbearing attack (he may also be pulled down by losing the opposed Strength check to fight off the overbearing attempt)
• Damage to the Mount: Wounding a mount during the battle (killing the steed always unhorses a character, no questions asked)