A piece of copper metal is heated in a flame and oxidized to black copper oxide by air. The oxidized copper is reduced when placed in a hydrogen atmosphere. When removed from the hydrogen atmosphere, the metal is again oxidized.
Simply touching dry nitrogen triiodide with a feather causes it to explode. Includes slow-motion replay of explosion.
A small piece of sodium metal is placed in a flask containing chlorine gas. Initially, no reaction is observed, but addition of a drop of water to the sodium initiates a vigorous reaction. Includes close-up replay of reaction.
Powdered aluminum and powdered iodine are mixed together. Adding drops of water to the mixture initiates a reaction.