I didn't like those too much, but I only remember her saying that in very scary situations, so maybe I'm making excuses, but it could be she isn't embarassed by her feelings. After all, if anybody like Sulu or McCoy said, "I'm scared" the torrent of Whimp! s would be deafening. Men aren't allowed to be scared. I'm not going to tell you what you saw, but I saw something different. McGivers didn't have the stomach to see Joachim beat Uhura anymore and saved herself. Uhura didn't look like she needed to be saved, she looked like she was about to beat him if she could just figure a way out how to do it. She only showed sorrow when Khan said Kirk was dead. Well, she did in the animated episode "The Lorelei Signal" I'm not sure if you count that, I do. It was the best part of the episode, she just doesn't assume command, she seizes it. Kirk and Spock are gone and Sulu and Scott are incapacitated but still on the bridge so she just takes command and tells them she's in charge. But it would have been nice in a live action episode, she doesn't do nearly that much in the movies, either.