In the scene when William returns home and there is a large festival taking place in town, well, he meets up with his old friend Heemish( we don't know this 'til later) they have a stone throwing contest. Heemish says "the English wont let us train with weapons so we train with stones" and then William picks up a little rock while Heemish has a giant boulder. When Heemish throws the boulder, it is going to go over Williams right shoulder, and then at the last minute it goes over his left. I think maybe the editors might have been stoned too???