1950s Facebook Training Film.

ROFL. HT: BZ@FB.

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Have you heard about NCBI ROFL? It's a previously-independent blog that has been incorporated into "Discoblog," one of the blogs at Discover Magazine.
How to ROFL:
From Arikia (The Millikan Daily) comes this LOL/LMAO/ROFL video of the day - Total Eclipse of the Heart: Literal Video Version:

It's just plain wrong that this coincides both with my watching tons of Mystery Science Theatre 3000 and playing Fallout 3 again. The confluence of 1950s stuff is pretty strong.

Jason: Just get under the desk, and cover your head, until the sirens stop.

I recall 'duck & cover'.
Later I did wonder about the nuclear shield properties of those desks.