After Seeing This
I'm more than about half-convinced this disputed video was real.
http://www.huffingtonpost.com/2011/11/23/toddlers-flour-disaster-video-parents_n_1110350.html
That stuff really spreads when thrown!
Also, I wondered how they were able to make such a film in 1917. Since the calendar read January, perhaps it was done before rationing of food and other staple items went into effect due to the war.