User blog comment:Nice Things/Because Magic?/@comment-23784953-20130604120326

A little random, but maybe thanks to the moon being broken, physics sorta works differently in the RWBY world?

That, or everyone is just a natural-born badass.

I think most of the magic we've seen in the RWBY world is super-advanced science that begins to resemble real magic, with the exception of Weiss, who uses real magic.

That still doesn't explain Ruby's rose petals though.