Explosive water tricks

Two videos showing what happens when alkali metals encounter water:

(Thanks to Charles D and BDan for the links.)

Added later:

J7y points out that, unfortunately and disappointingly, the Brainiac video (the second one I linked to above) was faked. (See followup article for confirmation.) He notes that Alkali Metal Bangs provides some legitimate info about this kind of thing, plus some non-faked videos.

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