just so all you guys know, yugi DOES NOT flip summon his rock monsters to send your monster back into your hand IF you attack it the first turn he sets it with unhappy girl. he'll flip it back face down next turn, simply atk it again.
There's no need to atk it again,you can leave then face-down,they will stay down while Unhappy Girl is on the field blocking then. Just block they,one time only. I tested this on the Guardians Statues from the NV30,but not sure about the Sphinx from NV40