Upon hearing a voice that is normal, human, and completely not auto-tuned in any way, shape, or form, Wheatley allows himself to first peek around the shelf, then step into the open, hands still hovering nervously over one of the holographic tablets.

"Oh, okay. Good. That's--good. It's good that it's just you and--" And not GLaDOS, or anyone else who wants to kill him, "--whoever you...are."