How about the half of the bottle stopper broken?
It is best to use special tools. The open, if not open normally, can put the bottle in his hands, gently hit the wall with the bottom of the bottle, the cork will slowly out of top, top to nearly half, put the bottle on the table, the bubble disappeared after pulling out the cork. This method is very good
You can put the cork to squeeze the bottle to the opposite direction, is the pressure, the bottle will never break, because wine is different from the other with gas beverage, wine bottle is specially treated, because you will not burst pressure. The average person uses a bottle opener to pull the cork out of the bottle. The method is to press the cork in the bottle. The effect is the same. And the bottle stopper is very clean.