Wow, had to look for a few seconds to realise what you were referring to.
I think it must be a distorted reflected image which looks like the duck is looking forwards. The dark stripe along the back edge of the reflection indicate that it's still facing in the same direction. I think the wave elongates and repeats the top of the head's reflection giving the impression of a neck and head (note the white patch shown twice). The "eye" and "beak" are reflective artifacts.
But then again, I could be wrong...
Maybe I need more neorologically active substances to partake in.