Dancing sodium

I want to begin with words of caution here, because this is a bit(?) dangerous. Sodium metal itself burns bare skin, gets burnt itself(although slowly) when in contact with air, kept under kerosene oil for this reason and handled with knives, tongs or suitable tools. And the amount of heat/fire that is generated here is not child's play. So be careful.

Cut a piece of the metal with knives or some tool under the kerosene sodium is kept. Cut a piece which is in noway bigger than 1cmx1cmx1cm. Next, find a metallic bucket(cannot be plastic or anything else that burns) and fill with water. Keep it in an open place, out of the house of course. Now take the piece of sodium with the tong and place it in the bucket of water. Distance yourself quickly(sometimes small explosions may follow) and enjoy the metal burning, hissing and dancing on water.

It happens because sodium, which is highly reactive, reacts with water to form sodium hydroxide - an alkali, and generates a lot of heat.