NEVER FAIL FLAKY PIE CRUST

Name: NEVER FAIL FLAKY PIE CRUST
Ingredients: 4 cups flour; 1 tbsp. sugar; 2 tsp. salt; 1 3/4 cup Crisco shortening (no substitutions); 1 lg. egg; 1 tbsp. white or cider vinegar; 1/2 c. water