Must be secret of the cow week. I've had our WH2O for a couple of years and only moments ago saw "Secret of the Cow" come up on the screen. Did a search on Pinside, and found this thread.
I saw the camera and cow come up after going through Big Foot's Cave 2 or 3 times in a row. Darn cool. Heard some "snapshot" sounds... glanced up, and it looked like Big Foot was captured on film or something... Hard to watch/play at the same time... then saw "Secret of the Cow" come up shortly afterward along with a "Mmmmmooooo!" sound effect.
Love little surprises like this... especially after owning the machine for some time.