Animal charcoal (bone black) is prepared by charring bones in iron retorts.
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But lightning is a much higher energy plasma than that which makes crop circles (where no charring occurs ).
3
During burning, antimony trioxide promotes charring of the resin, which reduces the formation of volatile gases.
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Having the same Greek origin are the scientific words "empyreuma" and "empyreumatic," applied to the characteristic smell of burning or charring vegetable or animal matter.
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If charring begins to happen, turn down the heat and flip the meat.
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The tests range from small scale charring tests (cone calorimeter) to large scale furnace tests.