I'm in a duel, and I play grand mole. I attack his face-down, activate his eff to return it to the hand. he says the monster gets flipped up, and I say no, because there's no damage calc. He said yes there is, because the damage step started, so I tell him to check the rulings. When, during that exchange, was I being unsportsman-like enough for him to hit the A.S.S. button? That's happened to me several times.