1.   But he started writing the script at a time when his own phenomenal success was beginning to taste sour.

2.   Going strictly by pH, for example, apples should taste more sour than rhubarb.

3.   In the presence of overwhelming grief, imagining an uprising, however small, tastes sour.

4.   The air tastes sour.

5.   Some of the students said the eclairs tasted sour.