Despair Inc has a satirical poster I’m fond of that says MISTAKES: it could be that the purpose of your life is only to serve as a warning to others. Well, DC Fire and EMS have taken that life lesson to heart for use in their safety demonstrations. During one at Galludet University their demo got away from them and ignited a plastic curtain, showering a few of the firefighters with molten goo. It all goes pear-shaped at 1:20 into the video, when the firefighters get too close in and the curtain which was meant to contain smoke goes up and falls on the firefighters who are, inexplicably, in the box rather than spraying from outside it.
One firefighter suffered minor burns to the face and hand and will be returning to work in short order, so hopefully he won’t be carrying any scars.