A man filmed himself flushing a toilet filled with liquid mercury instead of water. The result? A video I willingly spent 14 minutes of my free time watching last night. It's surprisingly cool and educational—despite being liquid, mercury is so dense that solid lead floats on top of it! Also, 240 pounds of mercury takes up a terrifyingly small amount of space.

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Plus, you can watch and be terrified that this guy is in the process of poisoning himself for the sake of a viral YouTube video!