Welcome to your Kitzur Quiz - Siman 056
8.
If you think you are about to drink a cup of wine, and begin making a b'racha, but before you say "borei p'ri hagafen" you realize that the cup is actually full of beer, and you say "shehakol nih'yeh bidvaro" - are you yotzei?
9.
Yitzchak just came home from work, and sits down to have exactly 1 cup of wine. After completing birchas hagafen but before tasting the drink, he realizes that it's actually prune juice. What should Yitzchak do?