Every time I turn on The Wizard of Oz (which is fairly often), I end up in a rabbit hole trying to remind myself how the filmmakers pulled off such a realistic tornado in 1939. Seriously, if you haven’t seen it in a while, pull up a clip on YouTube.  The Wizard of Oz was the first film to show a tornado on screen, which ended up being one of the largest expenses of the film’s budget. The studio actually didn’t recoup the cost of the movie until it re-released it a decade afte