When the Pie Was Opened
- बर्ष: 1941
- देश: United Kingdom
- विधा: Documentary, War
- स्टुडियो: Realist Films Ltd., Ministry of Information, Ministry of Agriculture, Fisheries and Food
- कीवर्ड: short film
- निर्देशक: Len Lye
- जात: Valerie Forrest, Hilda Masters