Anita spins, but the stairs are clear by the time she gets there. There's obviously more than one person here, and they are sitting ducks.

"Ronnie, go!" she shouts, pointing back toward the door. Just then, something slaps her on the back of her shoulder, and she hears another gunshot.

That's odd, she thinks. I didn't hear that one hit the ground. Then the gun in her hand suddenly feels very, very heavy, and her arm drops. She looks down and sees a little blossom of red on her shirt. Oh.