It really is one of my pet hates when a player shows only 1 card, or similar won"t turn cards at showdown, even though they took the last action. The cards won"t change their faces if you wait for 2 mins.
It really is a bad habit to turn 1 card over at a time.
# I think it is bad ettiquete
# It just slows down the game
# Gives rise to feeling like you"ve been slow rolled
As Ant said, he"d pulled the player up once, giving him warning. He took no notice and continued to play his way(home rules or such), doing it on the second occasion, is totally disrespectful and i too would be after the pot here.
You Play, oppo say, i call the dough, now
YOU show. That"ll be 2 cards please Mr Selfish, "your not seeing my cards how i play, even though you may have paid to see them" and the game goes on.
2cards ftw or the loss if he"s paid