aking the knight to be an enemy of the King, you try to block his charge toward the King by riding in front of his horse, which causes him to swerve into the path of another knight bearing down on him from behind. As he tries to regain control of his horse, he is thrown from the saddle by the other knight, who attacks him, wounding him badly. The knight who was just thrown was part of the Kings loyal bodyguard. His help in the battle might have turned the tide.
With the battle over and the king slain, your attention turns to other things: escape, overseas travel disguises, perhaps a new name.