Ahhh, I remember the last thread about this that was posted, what, a year or 2 ago?
I can't remember when it was but I do remember it!
My Stedman does this too (Tatum rarely EVER barks, but she sometimes will if she sees him doing it - only if he's going REALLY crazy with the barking though) but it IS indeed very freaky!
I don't know what the heck he hears, or what he sees, but whenever he does it I don't see or hear ANYTHING...so it is very odd
Who knows what these babies of ours can see and hear....obviously something we can't