It doesn't matter whether you know your neutrons from your protons to realise that something went disastrously wrong in this teachers chemistry lesson.
The incident happened at Glasgow High School in Kentucky, with one student documenting the experiment for the benefit of the scientific teaching community.
The teacher designed an experiment aimed to demonstrate what happens to natural gas as it's lit.
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Experiment: The science lesson starts off like any other Glowing: The teacher shows the students what happens as natural gas is set alightThe student decided to film the lesson because the balls of flame were leaving black marks on the ceiling.