I may have mentioned this before, but it remains relevant. English family, well all except dad, in his 70s, who was German. Son in Law in all innocence mentions the Dambusters 70th anniversary. Ah says Dad, when I was four years old I was in my bed and I heard planes and lots of bangs. In the morning as usual I went down to the Edersee - and went back and told my mother someone had pulled out the plug. Total silence ensued for several minutes