I swear this actually happened - I was playing the game (I forget the name of the location, by the second Vox message thing) and my dog walked into the room and I said "hey mutt", and in the game Booker says immediately after "my name's Booker". I should note, there was zero action at the time, the area was cleared, my room was quiet except for the trickle from my aquarium filter, and obviously my Kinect was on.
I've Googled it quite a bit and couldn't find anything validating this. I honestly don't know if it was complete coincidence or not. I tried numerous times to repeat it to no avail and I never heard him say that again randomly.
Anyone else have this happen??