"I have resorted to the "push it down into the bottle with a screwdriver or dull knife" method way too many times. But it works in a pinch..."
with this method , please please please filter with a coffee filter and decanter the wine... otherwise the cork will float in the wine - might upset your belly : /
there are other various ways to open a wine bottle but please ... if you are going to use a screwdriver/knife , make sure they are clean when you do use them
the easiest way is of course a corkscrew, they're cheap.
i promise