Chell jumps and turns, raising the rock defensively. There's no knife in evidence this time, though, and with slightly less adrenaline in her system she can finally track one important piece of information: the man with the pillow tucked under his arm only has one arm. So if he's holding the pillow, he can't easily hold a knife.

Okay. Okay. This doesn't seem like an immediate threat, but he sure does seem morose. After a moment, Chell slowly puts down the rock and then displays her empty hand. Nobody's armed now, right?

Then she displays the picture, assuming that he'll be able to get the gist of it even from the top of the stairs -- points at it quizzically, points at him, points back at the picture. Who are you and why are you in this photograph with her?