My dog likes to play that with me like that too. ill wait till hes busy doing something and then hide behind a tree on him and watch as he runs around trying to find me.

i stumped him really good once. i hid in the bed of my dads truck and lay flat on my back so he coudlnt see me at all. took him a long time to figure that one out.

once he finds me he barks at me runs around me in circles and then takes off running,, and ill hide on him again.

i guess its a game of more seeking then hiding though for him.