It probably seemed like a fun idea at the time, but hindsight makes us wonder why this wasn't doomed from the start. Unlike tinsel or cigarette-lighter hot Christmas lights, the fake snow of the 1930s through World War II never had to worry about being considered a fire hazard. That's largely because the fake snow popularized by The Wizard of Oz and Bing Crosby's Holiday Inn was made of flame-retardant asbestos. Yep, nothing like a little mesothelioma to brighten up the holiday. Even when asbestos was taken out of the mix, changing attitudes toward aerosols and some municipalities' refusal to recycle Christmas trees coated in the stuff put the squeeze on spray cans of the stuff. Now exiled to certain craft stores and eBay, aerosol cans of fake snow exist on the fringes of holiday decor. A quick look at the remaining cans' warnings about flammability and potential death from swallowing any of the sprayed snow makes it very clear why today's decorators prefer just-add-water packets of super absorbent polymer to the spray cans of Christmas past.