MOVIES HAVE LIED TO ME ABOUT SAFETY.
This is every gasoline-involving scene in a movie: someone wants to burn something up and so takes a big can of gasoline and splashes it around. Often in an enclosed space. They pensively light a match, or flick a lighter, pause, say something pithy, and then tough a corner of the gasoline and it lights up, the flame travelling (at just above walking speed) along just where the splashes were laid down. And the person walks away.
The TRUE SCIENCE FACT of this is that gasoline, once it's exposed to air, vaporizes madly, projecting huge columns of invisible but explosive vapors. Strike that first match and it'll instantly denotate those vapors. Right all up in your face. And then all the liquid gasoline everywhere will instantly ignite. Didja get a drop or two on your sleeve, shoe, or arm? You'll find out in the first few milliseconds after your match sparks! Oboy!
The safety lesson is to think of it this way: inside engines and storage tanks, gasoline gets to merely be "flammable"; everywhere else, it's explosive. Boom.
Also: I almost always use olive oil as a cooking oil, and when you goof up and overheat olive oil, it just smokes nastily. But on the rare occasions that I use Crisco, I find out the hard way that Crisco doesn't smoke; it ignites.