When the Pie Was Opened
- Metai: 1941
- Šalis: United Kingdom
- Žanras: Dokumentiniai, Kariniai
- Studija: Realist Films Ltd., Ministry of Information, Ministry of Agriculture, Fisheries and Food
- Raktažodis: short film
- Direktorius: Len Lye
- Vaidina: Valerie Forrest, Hilda Masters