Audio problem: When the Scots are applying a battering ram to the city gates, you can plainly hear someone shout "Stop, drop and roll", after the English set fire to the battering ram. (01:29:35)
Audio problem: At the end, when the sword is thrown and sticks into the ground, the sound of the sword sticking into the ground is not synced up with the impact.
Chosen answer: Just like he said, it would dull his wits and not leave him fully lucid the next day when he had to face the torture.
LorgSkyegon
He wanted his full awareness so he didn't accidentally yell for mercy.