Ok, you spend good money on a beer you have enjoyed before. You checked the best before date. You get out your favorite glassware after you've chilled the beer to the suggested serving temperature. You get out the opener eagerly. Crack,hiss you have bought a fire extinguisher or it has a wild yeast infection and just tastes off. What do you do, after you have changed your shirt ? Do you just get mad , do you return said beer to the point purchase and get your bread back or do you pour or drink it and treat it as a learning experience?