User blog comment:DiegoAnime3000/Black is for Polarity/@comment-15145664-20140110234404/@comment-3257939-20140111070716

Darkcloud, check the blog again. I wrote there:

''Also, when Weiss launches herself into the Boarbatusk, her Glyph became blue again and she jumps from it. She used the same Glyph to stop the Boarbatusk's charge since the blue Glyph is exactly that, a simple Glyph strong enough to be used as a floor to jump from it and a wall to protect yourself.''

The Black Glyph is only for pulling, not pushing. Weiss used the Black Glyph to pull herself into the air and right before she launched herself against the Boarbatusk, the Glyph became blue again. That means she can't get off the Black Glyph unless she changes it.