The horses
OK, here's a question after one viewing: Were the knight templars' horses 'ghost' horses, too? I guess they HAD to be ... Since they apparently were ghosts, were they also blind? Or was having seeing horses what made the mounted knights more efficient in running people down than the monks on foot?
Another thought: Had the girl been a better horseman (horsewoman?), could she possibly have gotten away on the ghost horse? Or, would it have let the others catch it anyway?
Or, am I guilty of putting more thought into this than the creators did? LOL