Shortly after this scene, the player is branded a traitor by the king and is forced to flee the palace with his butler, his man-at-arms and his dog in tow.
They were both expensive, highly trained horses prized by knights and nobles, and the poorer knight, squire or man-at-arms would use a rouncey for fighting.
The practicality of a man-at-arms being able to take off a great helm during a battle, if he wanted to continue fighting wearing just a bascinet, is unclear.