There is something magical about adding water to stuff to make it explode! Fun! Invigorating! As this video explains, alkali metals are just such a stuff. Rubidium and Cesium are particular amazing.
(Thanks Noah!)
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Previous related Wohba links:
Depth Charge
Ah yes, Brainiac. That’s good television! (I’m lucky enough to catch episodes on G4 occasionally.)
Unfortunately this all fake. Theodore Grey shows what really happens with each of the alkali metals. See http://theodoregray.com/PeriodicTable/AlkaliBangs/index.html