There's the smallest pause as River considers whether or not this is some kind of punishment for the time she beat Angelus up, but it passes with a frown and furrowed brow. If this is punishment, it's too belated and widespread for her to particularly care.

"I need to go," out of this body, this building, this situation.

Please ignore that in her attempt to leave she's walking knees out; this body has parts she's not ready to manage in any direct capacity yet, and walking like she just hopped off a horse is her way of avoiding the issue.