Jack stands his ground as the girl took the lead in dragging the man under the awning with the dog, getting him out of the open. It seems that the birds are dispersing, but without the man there in the open to attack anymore, Jack doesn't want to take any more chances in case the birds start to turn on him and his fellow rescuer. He can't exactly hear what the man is telling her, but the look that he gets is enough to make him roll his eyes. Christ, he knows that look. He's saving the man from getting mauled by birds. Beggars can't be choosers. Get over yourself, the look that he sends back seems to say, before he fires at another group of birds.

The girl seems to have the right idea in that they're leaving, and that they shouldn't let up now lest more come to the stragglers' aid. So Jack nods and does what she says, firing his gun at the groups of birds while she picks off the stragglers, until most of them are gone. Good thing too, since he's used up all the rounds in his gun.