She gives Jolie a look at that, but- okay, to be fair, she's breathing and talking, it's a not-unreasonable question. So she shakes her head, then draws a line across her own neck with her finger, both to mime a widely-accepted symbol for 'dead' and to, well, point out the neck wound.

She continues her trek down the hallway. Her 'walking' is sluggish and awkward, clearly struggling against the drag of the water, but she's powering through it. She figures Jolie can probably keep up pretty easily, considering.