Board Thread:Speculation House/@comment-112.198.77.191-20130912171139/@comment-23784953-20130912171642

If the White Trailer happened before RWBY begins, then a quick explanation can be said that Weiss didn't know how to cast spells in different locations   or she didn't feel the need to do so at the time she faught the Giant Armor.

There's a couple of guys a bit smarter than me on that subject. Expect a couple of them later.