As you probably know, cyanide is a highly poisonous substance. So consuming it is DEFINITELY not a good idea. Nonetheless, that's exactly what this one guy decided to do - all in the name of science.
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Thankfully, as he explains in the video, he only consumes a very tiny amount of cyanide - nowhere near the dose that would be required to kill a person of his size. But it still doesn't seem like the most brilliant idea to us...