Aluminum iodine reaction

Powdered aluminum and solid iodine are mixed and no reaction is observed. Adding water to the mixture initiates a reaction.

Oxidation and reduction of copper

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.

Nitrogen triiodide detonation

Simply touching dry nitrogen triiodide with a feather causes it to explode. Includes slow-motion replay of explosion.