Fireworks!

Although they're remarkable for a number of reasons, launching high into the air and detonating to produce spectacular, colored light patterns, there's more than just combustion occurring when it comes to fireworks. The explosions that occur, as well as their unique and vibrant colors, are driven by quantum transitions that occur all the way down at the level of atoms. 

This 4th of July, or any time when fireworks are set off, you should appreciate just how intricately nature needs to work in order to produce these luminous displays that entertain us so thoroughly.