Although there are no pie-throwing scenes in ‘The Buster Keaton Story,1' now showing at the Aztec, the celebrated-silent screen star got some of his biggest laughs when the pies were flying. At the press breakfast in Keaton’s suite at the St. Anthony hotel the other morning, Keaton talked of his pie-throwing feats With enthusiasm. He said, The prop men always provided the pies. Each had two crusts, one fitting snugly inside-the. other. They., had:.to- be made this way. If you had - only one thin crust, 'your fingers .would go through it'When you drew, back :to' throw?,The filling was a plain mixture of flour and water, at the right, consistency, to: stream oyer a person’s face, and clothes, Tp make the;pies look: just right and stain .clothing, we had . some whipped ■ cream and blueberries on top. Accuracy ^ was quit^ important in pie-throwing scenes. If;you missed someone's face and caught.him on the shoulder, then the victim had to be cleaned up before the scene could be filmed again.”. Fully warmed up to the subject, Keaton added, 'T hold all pie-throwing records.” One of these we learned, was catching someone smack in the face with a pie at a distance of 28 feet