Ok, try squatting like if you were having sex and you were on top, but do it on the floor. Then press down with all your muscles on it and try to push it out. If it is still stuck then the ER may be your best bet. Oh wait...what about a corkscrew? You could gently screw it into the apple and then maybe pull it out? I don't know if that would work. You need to be careful not to push it up higher.

EDIT..what about sticking a vacume cleaner hose to it? If you got the suction right it might pull it out. PLEASE post and let us know if you got it and how?? Going to bug me all night..lols