When you don’t have much time,
When you got you no money,
You want that Weekend Cinema
To bring you something funny!
Archive.org is a treasure trove of old stuff. Some of it you have to see to believe.
Some of you may be old enough to have seen this in school; I think they stopped showing it shortly before my time. Or maybe I blocked the memory. In any case, it’s worth looking at — first for the laugh, and then the sobering “what if” that is Duck and Cover. (10 minutes)
They have smaller versions for dialup users, although it still runs into some heft (like 10MB worth). Try one of the "64kB" links to the left if you need it.