Revealing mistake: During the sword fight in the blacksmith's shop, Will pulls a blade out of the fire. While fighting Jack, the heated blade sparks when their two swords clash. When Will blocks a hit from Jack, the impact is far BELOW the red/orange hot section of Will's sword, yet it sparks right at that spot. It also makes a kind of sound like electricity crackling. A heated blade would not make this noise, nor would it send out embers or sparks where it is not heated. Only the tip is heated, however the whole blade has an electrical current running through it, mentioned in another mistake. (00:24:15)