At some point in the movie October Sky (1999) flames were created. I didn't clearly get it. So What really happened in the chemistry lab?
One pair of boys poured chemicals, watered downed, down the drain to dispose of it. A different boy then dropped a match down a different drain. The movie depicts this as igniting the chemicals, accidentally causing all the sinks to catch on fire.
Of course, the chemicals in the scene, when watered down like that, wouldn't react that way. It also ignores plumbing, as the u trap of the sinks should have water in them and that would also prevent all the sinks from catching on fire.