User blog comment:Zathronas/Analysis by an author: Volume 2 episode 11: No brakes/@comment-3146930-20141024021616/@comment-3146930-20141024031000

Someone already pointed out that her eye change is a side effect of her Semblance.

I am aware that her Semblance only increases her physical strength and not really her speed as far as we can tell, but the fact that Neo was hitting Yang fairly consistently and Yang didn't use her Semblance is very odd. In most of Yang's fights, she will use her Semblance even when she doesn't need to. So for Neo to make Yang that angry and Yang not even show a flash of red isn't normal Yang combat protocol. Who knows, maybe Yang could have used that extra boost in strength to take out that umbrella.