Sodium's Explosion in Water Is a Coulomb Explosion

HN links it as the accessible video explanation of the sodium-in-water research, and when Coulomb explosions or sodium batteries come up.

Thunderf00t presents high-speed camera footage of alkali metals such as sodium and NaK reacting with water. The footage shows that the explosion is not caused by hydrogen ignition, as the usual explanation says. It is a Coulomb explosion driven by electrons leaving the metal.