Hi Calcat, my Sadie does exactly the same as Eliza. In Sadie's version of the game she always chirrups loudly as we enter the room she's in, and excitedly dashes off, then comes looking for us if we don't chase her straightaway. She does it outside as well, hiding in bushes, and then leaping out - and by the look on her face she is obviously quite convinced that we are really scared by her fierceness. Aren't they lovely timewasters?